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VOS3000 2.1.9.07 New Version Powerful Features Upgrade Guide Complete

May 10, 2026May 10, 2026 king

VOS3000 2.1.9.07 New Version Powerful Features Upgrade Guide Complete

The VOS3000 2.1.9.07 new version delivers powerful features that address the evolving needs of wholesale and retail VoIP operators worldwide. This comprehensive upgrade guide covers every new capability, parameter change, and configuration enhancement introduced in this release. Whether you are running V2.1.8.0 or V2.1.8.05, upgrading brings measurable improvements in SIP protocol handling, billing precision, security hardening, gateway failover intelligence, and media processing. Contact us on WhatsApp at +8801911119966 for expert assistance with your upgrade.

Operators who delay upgrading face increasing compatibility issues with upstream SIP providers, billing rounding errors compounding over millions of calls, and security vulnerabilities exposing systems to toll fraud. This guide walks you through every feature, every new parameter, and every step of the upgrade process so you can deploy with confidence. For detailed change documentation, see our VOS3000 2.1.9.07 release notes.

  ================================================================
  🚀 VOS3000 2.1.9.07 NEW VERSION — FEATURE OVERVIEW
  ================================================================

  [1] 📡 SIP PROTOCOL UPGRADES
      |-> Enhanced SIP timer handling
      |-> Improved retransmission control
      |-> Better NAT traversal reliability
      v
  [2] 💰 BILLING PRECISION IMPROVEMENTS
      |-> FEE_PRECISTION expanded range
      |-> HOLD_TIME_PRECISION refinement
      |-> Overdraft prevention enhancement
      v
  [3] 🔐 SECURITY HARDENING
      |-> SS_AUTHENTICATION_MAX_RETRY limits
      |-> Lightweight SIP registration mode
      |-> SS_TCP_CLOSE_RESET for TCP SIP
      v
  [4] 🛤️ GATEWAY FAILOVER INTELLIGENCE
      |-> ASR-based routing (SS_GATEWAY_ASR_CALCULATE)
      |-> Switch limit controls
      |-> RTP-start lock prevention
      v
  [5] 🌐 WEB API ENHANCEMENTS
      |-> New API methods for call control
      |-> Real-time monitoring endpoints
      |-> CDR query improvements
      v
  [6] 🎵 IVR AND MEDIA MODULE UPGRADES
      |-> DTMF detection improvements
      |-> Media proxy optimization
      |-> Transcoding reliability fixes
      v
  [7] 🖥️ CENTOS 7 AND KERNEL COMPATIBILITY
      |-> Full CentOS 7.x support
      |-> Kernel 3.10 compatibility
      |-> Repository configuration updates
  ================================================================

📡 Overview of V2.1.9.07 as the Latest Stable Release

The VOS3000 2.1.9.07 new version is the current stable production release, superseding all V2.1.8.x builds. It incorporates bug fixes, security patches, and feature enhancements accumulated since V2.1.8.05. For operators still on V2.1.8.0, this release includes every improvement from V2.1.8.05 plus substantial new functionality impacting call routing intelligence, billing accuracy, and system security.

Production stability is the hallmark of this release. The VOS3000 2.1.9.07 new version has been deployed across hundreds of operator environments globally, handling call volumes from small retail operations with 50 concurrent calls to large wholesale carriers processing 5000+ concurrent sessions. The stability improvements address memory management under high concurrency, CDR generation reliability during traffic spikes, and SIP signaling integrity when interacting with diverse provider equipment.

🔧 Key New Features Compared to V2.1.8.x

The VOS3000 2.1.9.07 new version introduces significant feature upgrades across seven core areas. Each improvement addresses real-world operator pain points identified through field feedback.

📡 Enhanced SIP Protocol Support Improvements

SIP protocol handling is the foundation of any softswitch, and the VOS3000 2.1.9.07 new version delivers critical improvements. SIP timer management has been refined with better default values for SS_SIP_SESSION_TIMER and SS_SIP_INVITE_TIMEOUT, reducing unnecessary session terminations on networks with higher latency. Retransmission logic now handles SIP 100 Trying and 1xx provisional responses more intelligently, preventing retransmission storms under heavy call volumes.

NAT traversal reliability has been significantly enhanced in the VOS3000 2.1.9.07 new version. The SS_SIP_NAT_KEEP_ALIVE parameter now supports more granular interval settings. SIP Via header handling has been corrected to properly record received parameters, resolving one-way audio issues when the softswitch is behind NAT firewalls. These improvements mean fewer failed registrations, reduced one-way audio complaints, and more stable SIP trunk connections.

💰 Improved Billing Precision Parameters

Billing accuracy is critical for operator profitability, and the VOS3000 2.1.9.07 new version introduces enhanced billing precision that eliminates revenue leakage from rounding errors. FEE_PRECISTION now supports up to 4 decimal places, essential for wholesale operators dealing with rates as low as $0.0005 per minute. At 2 decimal places, a rate of $0.0049 gets stored as $0.00, resulting in zero billing. The expanded precision ensures every fraction of a cent is captured.

HOLD_TIME_PRECISION has been refined in the VOS3000 2.1.9.07 new version with a configurable threshold controlling how call duration is rounded before billing calculation. PREVENT_OVERDRAFT_ADVANCE_TIME offers better control over prepaid account protection, preventing accounts from going negative during high-speed call bursts. These billing enhancements directly protect operator revenue and improve customer billing transparency.

🔐 Better Security Features

Security hardening in the VOS3000 2.1.9.07 new version addresses the growing threat landscape facing VoIP systems. SS_AUTHENTICATION_MAX_RETRY limits the number of SIP authentication retry attempts from a single IP before temporary suspension, directly mitigating brute-force credential stuffing attacks. Combined with SS_AUTHENTICATION_FAILED_SUSPEND, the system automatically blocks attacking IP addresses for a configurable duration.

Lightweight SIP registration mode in the VOS3000 2.1.9.07 new version reduces the processing overhead of SIP REGISTER handling by implementing a streamlined authentication path for known endpoints. This allows higher volume of legitimate registrations while still enforcing authentication, making the system more resistant to registration flood attacks.

SS_TCP_CLOSE_RESET provides improved TCP connection management for SIP over TCP. When enabled, the system sends a TCP RST instead of a graceful FIN close, freeing server resources faster. This is critical for high-CPS environments where thousands of SIP TCP connections are established and torn down every minute, preventing TCP TIME_WAIT accumulation that exhausts available ports.

🛡️ Parameter	📖 Purpose	🔧 Default	💡 Recommended
SS_AUTHENTICATION_MAX_RETRY	Limit SIP auth retry attempts	0 (unlimited)	3
SS_AUTHENTICATION_FAILED_SUSPEND	Suspend IP after exceeded retries	Disabled	Enabled, 3600s
SS_TCP_CLOSE_RESET	TCP RST instead of FIN for SIP	0 (FIN)	1 (RST)
SERVER_LOGIN_FAILED_DISABLE_TIME	Lock client login after failures	0	300 seconds
SERVER_PASSWORD_LENGTH	Minimum password length	6	8
SS_SIP_REGISTRATION_LIGTHWEIGHT	Lightweight registration mode	0 (standard)	1 (high-volume)

🛤️ Gateway Failover Enhancements with ASR-Based Routing

Gateway failover intelligence receives a major upgrade in the VOS3000 2.1.9.07 new version with ASR-based routing. SS_GATEWAY_ASR_CALCULATE enables the system to monitor Answer Seizure Ratio per routing gateway in real time. When ASR drops below a configurable threshold, the system automatically deprioritizes that gateway, routing traffic to higher-performing alternatives. This is a significant improvement over static priority-based routing, which continues sending calls to underperforming gateways until manually reconfigured.

SS_GATEWAY_SWITCH_LIMIT in the VOS3000 2.1.9.07 new version controls the maximum number of failover attempts per call. SS_GATEWAY_SWITCH_STOP_AFTER_RTP_START prevents mid-call failover once media is flowing, avoiding one-way audio caused by switching gateways after the audio path is established.

⚙️ Parameter	📕 V2.1.8.x	📗 V2.1.9.07	📊 Impact
SS_GATEWAY_ASR_CALCULATE	Not available	Enabled with threshold	Automatic quality-based routing
SS_GATEWAY_SWITCH_LIMIT	Fixed range	Extended range with defaults	Better failover control
SS_GATEWAY_SWITCH_STOP_AFTER_RTP_START	Basic	Enhanced with timing	Prevents one-way audio
ASR Threshold per Gateway	Manual only	Auto-calculate and apply	Real-time quality adaptation

🌐 Web API V2.1.9.07 Improvements

The Web API introduces new methods for programmatic system control, enabling operators to build custom integrations and automation workflows. New methods include enhanced call control capabilities such as callback initiation and call interruption, real-time monitoring endpoints providing live system metrics including concurrent call counts and ASR per gateway, and improved CDR query methods with filtering and pagination support.

Response formats are more consistent, error handling is more informative, and the API now supports bulk operations for account management tasks such as batch balance adjustments and rate table assignments. The Web API remains the primary programmatic interface, as the platform does not originally include a web management interface or mobile applications. For detailed API documentation, see our VOS3000 2.1.9.07 original English manual reference.

🎵 IVR Module Enhancements

The IVR module in the VOS3000 2.1.9.07 new version receives improved DTMF detection reliability. DTMF digits transmitted via RFC2833 are now parsed more accurately, reducing instances where digit presses are missed or duplicated during IVR menu navigation. This is particularly important for calling card platforms where customers navigate through language selection, balance announcement, and destination number entry.

Voicemail navigation benefits from enhanced UDP alarm handling, ensuring voicemail status notifications are delivered reliably. The IVR state machine has been refined to handle edge cases more gracefully, such as when a caller hangs up during prompt playback or when DTMF input times out.

🎤 Media Proxy and Transcoding Improvements

Media handling in the VOS3000 2.1.9.07 new version includes optimizations to the media proxy engine that reduce CPU utilization during high-concurrency transcoding. When calls require codec conversion between G.711 and G.729, the transcoding engine now uses more efficient algorithms that lower per-call CPU consumption by approximately 15%. For operators running 1000+ concurrent transcoded calls, this translates to measurable cost savings.

RTP media proxy reliability has been improved with better handling of RTP timeout detection, preventing ghost calls that consume concurrent line capacity without actual media. Bandwidth management parameters have been extended with more granular control over per-call bandwidth allocation. For a complete feature summary, visit our VOS3000 2.1.9.07 feature list and offers page.

🔍 Feature Area	📕 V2.1.8.x	📗 V2.1.9.07	📈 Benefit
SIP Timer Management	Basic defaults	Refined values with options	Fewer session drops
Billing Precision	2-3 decimal places	Up to 4 decimal places	Accurate rate capture
Auth Retry Limiting	Not available	SS_AUTHENTICATION_MAX_RETRY	Brute-force prevention
ASR-Based Routing	Not available	SS_GATEWAY_ASR_CALCULATE	Quality-based failover
Web API Methods	Standard set	Extended with monitoring	Richer integrations
IVR DTMF Detection	Occasional missed digits	Improved RFC2833 parsing	Reliable navigation
Transcoding CPU	Baseline	~15% reduction per call	Higher capacity
CentOS 7 Support	Limited	Full with kernel 3.10	Modern OS deployment

🔄 Upgrade Path from V2.1.8.0 / V2.1.8.05 to V2.1.9.07

Upgrading to the VOS3000 2.1.9.07 new version from V2.1.8.x requires careful planning to ensure data preservation and minimize service disruption. The upgrade is a migration to a new installation rather than an in-place patch. You must back up your existing database, install the new version on your server, and restore configuration data. Our team can execute this process with minimal downtime, typically under 2 hours. Contact us on WhatsApp at +8801911119966 for professional upgrade assistance.

The recommended procedure for the VOS3000 2.1.9.07 new version follows a specific sequence: first, export all configuration data from V2.1.8.x including rate tables, gateway configurations, account data, and CDR records. Second, perform a clean CentOS installation with the appropriate kernel version. Third, install the V2.1.9.07 software package and verify services start correctly. Fourth, import configuration data, mapping any parameter names that changed between versions. Fifth, configure all new parameters with appropriate values rather than relying on defaults.

🔢 Step	⚙️ Action	⏱️ Duration	⚠️ Critical Notes
1	Export V2.1.8.x configuration and CDR data	30-60 min	Verify export completeness
2	Back up existing server completely	60-120 min	Full disk image if possible
3	Install CentOS with compatible kernel	60-90 min	Must match V2.1.9.07 requirements
4	Install VOS3000 V2.1.9.07 package	30-45 min	Verify all services start
5	Run database migration scripts	15-30 min	Follow sequence strictly
6	Import V2.1.8.x configuration data	30-60 min	Map changed parameter names
7	Configure new V2.1.9.07 parameters	60-120 min	Set security and failover params
8	Test call flows and billing accuracy	60-120 min	Minimum 20 test calls
9	Switch production traffic to new system	15-30 min	DNS TTL or IP cutover

🖥️ CentOS 7 Support and Kernel Compatibility

Full CentOS 7 support is one of the most requested improvements in the VOS3000 2.1.9.07 new version. Previous versions were primarily designed for CentOS 6.10, which reached end-of-life in November 2020. Running a softswitch on an unsupported OS creates security risks from unpatched vulnerabilities. The VOS3000 2.1.9.07 new version has been validated on CentOS 7.x with kernel 3.10, providing a supported OS foundation.

Kernel compatibility extends beyond simply booting the software. The release includes kernel module builds specifically compiled for CentOS 7 kernel 3.10 series, handling low-level SIP signaling processing and RTP media handling. Running modules on an incompatible kernel causes EMP startup failures and system panics. The CentOS 7 repository configuration has also been updated to point to correct package repositories, essential because CentOS 7 moved to the Vault archive after end-of-life. For detailed instructions, see our VOS3000 CentOS kernel and repo guide.

💻 OS Version	🔧 Kernel	📕 V2.1.8.0	📗 V2.1.8.05	📘 V2.1.9.07
CentOS 6.10	2.6.32-754	✅ Supported	✅ Supported	✅ Supported
CentOS 7.x	3.10.0-xxx	❌ Not supported	⚠️ Partial	✅ Fully supported
CentOS 8.x	4.18+	❌ Not supported	❌ Not supported	❌ Not supported
Ubuntu 18/20	Various	❌ Not supported	❌ Not supported	❌ Not supported

⚙️ New Server Parameters Added in V2.1.9.07

The VOS3000 2.1.9.07 new version adds several new server parameters that control system-level behavior including login security, password policies, and billing record handling. These are configured through the VOS3000 client interface under the server parameters section. Understanding each parameter and its impact is essential when upgrading from V2.1.8.x.

🔧 Parameter	📖 Description	🔢 Range	💡 Recommended
SERVER_LOGIN_FAILED_DISABLE_TIME	Seconds to lock account after failed logins	0-86400	300
SERVER_PASSWORD_LENGTH	Minimum password character length	6-32	8
SERVER_BILLING_RECORD_ILLEGAL_CALL	Record CDR for unauthorized IP calls	0/1	1 (audit trail)
BILLING_FREE_E164S	Toll-free number prefixes	String	Per country codes
BILLING_NO_CDR_E164S	Number prefixes skipping CDR generation	String	Per operational needs
PREVENT_OVERDRAFT_ADVANCE_TIME	Minutes to check balance before connecting	0-60	5
FEE_PRECISTION	Decimal places for fee calculations	0-4	4 (wholesale)
HOLD_TIME_PRECISION	Duration rounding threshold in ms	0-1000	50

Each new server parameter in the VOS3000 2.1.9.07 new version should be reviewed and configured after upgrade. SERVER_LOGIN_FAILED_DISABLE_TIME set to 0 means no account lockout after failed login attempts, leaving the system vulnerable to brute-force attacks. Setting this to 300 seconds locks the account for 5 minutes after consecutive failures, sufficient to deter automated attacks.

🎛️ New Softswitch Parameters Added in V2.1.9.07

Softswitch parameters control real-time call processing behavior, and the VOS3000 2.1.9.07 new version introduces several critical new parameters governing SIP authentication, gateway failover logic, TCP connection management, and registration handling.

🎛️ Parameter	📖 Description	🔢 Range	💡 Recommended
SS_AUTHENTICATION_MAX_RETRY	Max SIP auth retries before suspend	0-100	3
SS_AUTHENTICATION_FAILED_SUSPEND	Auto-suspend duration in seconds	0-86400	3600
SS_TCP_CLOSE_RESET	Use RST instead of FIN for TCP SIP	0/1	1 (high-CPS)
SS_SIP_REGISTRATION_LIGTHWEIGHT	Lightweight registration processing	0/1	1 (high-volume)
SS_GATEWAY_ASR_CALCULATE	Enable ASR monitoring per gateway	0/1	1
SS_GATEWAY_SWITCH_LIMIT	Max failover attempts per call	0-100	3-5
SS_GATEWAY_SWITCH_STOP_AFTER_RTP_START	Lock route after media starts	0/1	1
SS_REPLY_UNAUTHORIZED	Respond to unknown SIP sources	0/1	0 (public)
SS_SIP_SESSION_TIMER	SIP session expiration in seconds	0-86400	1800
SS_SIP_INVITE_TIMEOUT	INVITE transaction timeout in ms	1000-120000	30000

SS_GATEWAY_ASR_CALCULATE in the VOS3000 2.1.9.07 new version should be enabled on any system with multiple routing gateways. SS_SIP_REGISTRATION_LIGTHWEIGHT should be enabled on systems handling more than 500 concurrent registrations. These parameters are accessible through the client interface, allowing operators to tune call processing behavior without modifying configuration files directly.

▶️ Service Start and Restart Commands for V2.1.9.07

Managing services in the VOS3000 2.1.9.07 new version follows specific command sequences. Each service must be started in the correct order because of interdependencies. For comprehensive command documentation, see our VOS3000 2.1.9.07 service commands guide.

The correct startup sequence is: start EMP (Embedded MySQL) first, then the VOS3000 server service, and finally the softswitch service. Starting services out of order causes connection failures. The restart sequence follows reverse order for stopping.

▶️ Action	💻 Command	📝 Notes
Start EMP	service emp start	Must start first
Start Server	service vos3000d start	Requires EMP running
Start Softswitch	service mbx3000d start	Requires Server running
Stop Softswitch	service mbx3000d stop	Stop first on shutdown
Stop Server	service vos3000d stop	Stop second on shutdown
Stop EMP	service emp stop	Stop last on shutdown
Check Status	service vos3000d status	Verify all services running
Restart All	Stop in reverse, start in order	Full restart sequence

After starting all services, verify each is running correctly. EMP should show MySQL port 3306 listening. The vos3000d service should be active. The mbx3000d service should have SIP signaling ports (default 5060 UDP/TCP) bound. Common startup failures include EMP port conflicts with system MySQL, kernel module loading errors, and license validation failures. Need help? WhatsApp us at +8801911119966.

🌐 Client Software Changes: Chinese to English Client Fix

A common issue when installing the VOS3000 2.1.9.07 new version is that the VOS3000 2.1.9.07 new version client software displays in Chinese rather than English. The default installation includes the Chinese locale as the primary interface language, and the client application does not have a simple language toggle in the settings menu. The fix involves replacing the Chinese language resource files with English equivalents.

The language resource files are stored in the client installation directory under the resources or lang subfolder. By replacing or renaming the Chinese resource bundle with the English version, the client interface switches to English on the next launch. This is a client-side change only and does not affect server-side configuration or call processing.

For step-by-step instructions, see our dedicated guide at how to change VOS3000 2.1.9.07 Chinese client to English client. The client includes the same functionality in both language versions, so no features are lost when switching to English.

⚠️ Common Issues When Upgrading and How to Solve Them

Upgrading to the VOS3000 2.1.9.07 new version can present several common issues. Being aware of these problems before starting saves significant time and prevents service disruptions.

Issue 1: EMP Fails to Start After Installation. This is the most common problem. EMP fails because the default MySQL port 3306 is already in use by a system MySQL package, or required shared libraries are missing. Solution: Remove system MySQL packages using “yum remove mysql mysql-server” and install required dependencies. Verify with “netstat -tlnp | grep 3306” that the port is free before starting EMP.

Issue 2: Kernel Module Loading Fails. Kernel modules are compiled for specific kernel versions. If your CentOS has a different kernel, modules will not load. Solution: Verify your kernel version with “uname -r” and ensure it matches a supported version. Install the specific kernel version required and reboot before installing VOS3000.

Issue 3: License Validation Errors. After upgrading, the license may fail if you performed a clean installation on new hardware, since license keys are tied to server hardware fingerprints. Solution: Contact your license provider to obtain a new key for the new hardware fingerprint.

Issue 4: CDR Data Migration Gaps. Some operators discover gaps in historical CDR data after import. Solution: Use the CDR export tool with the full date range option. Verify the exported record count matches the source database count before importing.

Issue 5: Rate Table Rounding Differences. Expanded FEE_PRECISTION may cause existing rate values to display differently. Rates rounded at 2 decimal places in V2.1.8.x may now show full 4-decimal precision. Solution: Review all rate tables after migration and verify rate values are correct at the new precision level.

Issue 6: Gateway Registration Failures After Upgrade. Some SIP gateways may fail to register due to changes in SIP authentication behavior. Solution: Review SS_AUTHENTICATION_MAX_RETRY and SS_SIP_REGISTRATION_LIGTHWEIGHT parameters. If lightweight registration is enabled and gateways use complex authentication, try disabling it temporarily.

🏆 Why Operators Should Upgrade to VOS3000 2.1.9.07 New Version

The decision to upgrade to the VOS3000 2.1.9.07 new version is driven by compelling operational, security, and financial reasons. Security vulnerabilities in older versions leave systems exposed to evolving attack methods, while billing precision limitations cause revenue leakage that compounds with call volume. The ASR-based routing capability alone can improve call completion rates by 5-15%, directly impacting revenue.

CentOS 6 end-of-life is a critical reason. Running a production softswitch on an unsupported OS means no security patches for newly discovered vulnerabilities. The VOS3000 2.1.9.07 new version with CentOS 7 support provides a path to a maintained operating system with ongoing security updates.

The billing precision improvements have a direct financial impact. For a wholesale operator processing 10 million minutes per month at an average rate of $0.005, a rounding error of just 0.1% from insufficient decimal precision results in $500 per month in lost revenue. Over a year, that is $6,000 in revenue that disappears due to rounding. The upgrade eliminates this leakage entirely.

Future compatibility is another consideration. Upstream SIP providers regularly update their equipment. The improved SIP protocol handling in the VOS3000 2.1.9.07 new version is better positioned to maintain compatibility with evolving provider infrastructure. Operators on older versions increasingly encounter interop issues with providers running newer SIP stacks.

Ready to upgrade? Our team at Multahost provides expert upgrade services with minimal downtime. Contact us on WhatsApp at +8801911119966 or visit vos3000.com for official download resources. The VOS3000 2.1.9.07 new version positions your operation for growth, security, and profitability in the competitive VoIP market.

❓ Frequently Asked Questions About VOS3000 2.1.9.07 New Version

❓ Can I upgrade directly from V2.1.8.0 to V2.1.9.07?

Yes, you can upgrade directly. The V2.1.9.07 installation includes all changes from V2.1.8.05 and additional features, so there is no need to upgrade to V2.1.8.05 first. However, the upgrade is a migration process rather than an in-place update, meaning you must back up your V2.1.8.0 data, install V2.1.9.07 fresh, and then import your configuration and CDR data. Migration scripts handle schema differences automatically.

❓ Does V2.1.9.07 include a complete web management interface?

No, VOS3000 does not originally include a full web management interface or native mobile applications. The V2.1.9.07 release continues to use the Windows client software as the primary management interface, along with the Web API for programmatic access. The Web API provides methods for account management, call control, CDR queries, and real-time monitoring that can be used to build custom web dashboards. But from VOS3000 2.1.8.05 to 9.07 have BASIC Mobile Manage (web management for basic work only)

❓ How long does the upgrade to V2.1.9.07 take?

A standard upgrade from V2.1.8.x typically takes 2-4 hours including backup, installation, data migration, parameter configuration, and testing. Complex deployments with large CDR databases or numerous gateways may take 4-8 hours. The actual downtime for live traffic is typically under 2 hours, as most preparation work can be done while the old system is still running. (VOS3000 2.1.9.07 New Version)

❓ Is CentOS 7 required for V2.1.9.07?

CentOS 7 is not strictly required, as V2.1.9.07 also supports CentOS 6.10. However, CentOS 6.10 reached end-of-life in November 2020 and no longer receives security updates. We strongly recommend deploying on CentOS 7.x for any new installation or upgrade. The V2.1.9.07 release has been fully validated on CentOS 7 with kernel 3.10. (VOS3000 2.1.9.07 New Version)

❓ What happens to my existing rate tables after upgrade?

Rate tables are preserved during the upgrade through the data migration process. However, because FEE_PRECISTION now supports up to 4 decimal places, rate values that were rounded at lower precision in V2.1.8.x may display with additional decimal places after migration. Review all rate tables after import to verify that rate values are correct at the new precision level. (VOS3000 2.1.9.07 New Version)

❓ Can I roll back to V2.1.8.x if the upgrade fails?

Yes, rollback is possible if you performed a complete backup before starting. Since the upgrade is a migration rather than an in-place update, your original V2.1.8.x system remains intact until you switch production traffic. If issues are discovered during testing, you can continue running on the old system while resolving problems. A full disk image backup provides the fastest rollback option.

Upgrading to the VOS3000 2.1.9.07 new version is a strategic investment in your VoIP operation. From ASR-based gateway failover and 4-decimal billing precision to CentOS 7 support and enhanced SIP protocol handling, every feature addresses real operator needs. Our expert team at Multahost is ready to assist. WhatsApp us at +8801911119966 for professional guidance, or explore our related resources below. (VOS3000 2.1.9.07 New Version)

📞 Need Professional VOS3000 Setup Support?

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📱 WhatsApp: +8801911119966
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Sistema VOS3000 Registro Salida SIP Important: Expiracion, Reintento, Privacidad y Dominio Local

May 6, 2026May 6, 2026 king

Sistema VOS3000 Registro Salida SIP Complete: Expiracion, Reintento, Privacidad y Dominio Local

El sistema VOS3000 registro salida SIP permite que la plataforma se registre activamente con proveedores SIP upstream, un requisito fundamental para establecer troncales SIP con carriers y operadores que exigen autenticacion basada en registro. Mientras que el registro entrante maneja las conexiones de los clientes hacia VOS3000, el registro de salida del sistema VOS3000 registro salida SIP maneja las conexiones de VOS3000 hacia los proveedores, completando el flujo bidireccional necesario para operar como un softswitch profesional. Si necesita asistencia con la configuracion del sistema VOS3000 registro salida SIP, contactenos por WhatsApp al +8801911119966.

Los parametros del sistema VOS3000 registro salida SIP cubren siete areas criticas: los tres parametros de registro de salida (EXPIRE, RETRY_DELAY, SEND_UNREGISTER), la cabecera de privacidad, la reescritura de dominio local, el manejo de Display From, el ruteo via Contact header, y la transparencia de cabeceras extra. Segun el manual oficial VOS3000 V2.1.9.07 seccion 4.3.5.2, estos parametros se configuran en el menu Softswitch Parameters del cliente VOS3000 y afectan la forma en que VOS3000 se presenta ante los proveedores SIP.

  ================================================================
  🌐 SISTEMA VOS3000 REGISTRO SALIDA SIP — 7 AREAS CRITICAS
  ================================================================

  [1] 📤 REGISTRO UPSTREAM (3 PARAMETROS)
      |-> EXPIRE: tiempo de vida del registro
      |-> RETRY_DELAY: reintento en fallo
      |-> SEND_UNREGISTER: limpieza al remover
      v
  [2] 🔒 CABECERA DE PRIVACIDAD
      |-> SS_SIP_USER_AGENT_PRIVACY
      |-> Oculta topologia de red
      |-> RFC 3323 compliance
      v
  [3] 🏷️ DOMINIO LOCAL
      |-> Enable Local Domain Name
      |-> Reescribe IP a dominio en From
      |-> Proveedores que rechazan IPs
      v
  [4] 📱 DISPLAY FROM SIP
      |-> SS_SIP_E164_DISPLAY_FROM
      |-> E.164 vs nombre personalizado
      |-> Presentacion de Caller ID
      v
  [5] 🔀 RUTEO VIA CONTACT
      |-> SS_SIP_ROUTING_GATEWAY_INVITE_USE_CONTACT
      |-> Resuelve ruteo asimetrico
      |-> Para gateways detras de NAT
      v
  [6] 📋 CABECERAS EXTRA
      |-> Allow All vs Allow Specified
      |-> X-headers y P-headers
      |-> Interoperabilidad con proveedores
      v
  [7] ✅ INTEGRACION COMPLETA
      |-> Combinar todos los parametros
      |-> Proveedor checklist
      |-> Troubleshooting comun
  ================================================================

🌐 Introduccion al Registro SIP de Salida en VOS3000

El registro SIP de salida es una funcion esencial del esta configuracion que permite a la plataforma registrarse como un cliente SIP ante proveedores upstream. A diferencia del registro entrante donde los gateways y telefonos se registran en VOS3000, el registro de salida es VOS3000 quien se registra en el servidor del proveedor, enviando mensajes REGISTER periodicos con credenciales de autenticacion.

Los proveedores SIP que requieren registro outbound impiden que VOS3000 simplemente envie INVITEs sin estar registrado, rechazando las llamadas con respuestas 403 Forbidden o 401 Unauthorized. El esta funcion resuelve este problema manteniendo un registro activo con el proveedor, de modo que cuando VOS3000 necesita enviar una llamada, el proveedor ya reconoce la identidad del softswitch y permite el trafico. Este flujo es estandar en la industria y es compatible con la mayoria de los carriers SIP del mundo.

La configuracion del esta plataforma requiere conocer los parametros especificos del proveedor: la direccion del servidor SIP, el puerto, el nombre de usuario y la contrasena, y el dominio de registro. Cada proveedor puede tener requisitos ligeramente diferentes, pero los parametros del el softswitch son lo suficientemente flexibles para adaptarse a cualquier configuracion estandar.

📤 Tres Parametros de Registro de Salida

El el softswitch VOS3000 incluye tres parametros fundamentales que controlan el comportamiento del registro upstream: EXPIRE define cuanto tiempo es valido el registro antes de que necesite renovarse, RETRY_DELAY define cuanto esperar antes de reintentar un registro fallido, y SEND_UNREGISTER controla si se envia un mensaje de desregistro cuando se elimina la configuracion del gateway.

El parametro EXPIRE del esta caracteristica define el tiempo de vida del registro en segundos. Los valores tipicos van de 60 a 3600 segundos. Un valor mas corto significa registros mas frecuentes pero mayor trafico SIP, mientras que un valor mas largo reduce el trafico pero tarda mas en detectar si el registro se pierde. La mayoria de los proveedores SIP aceptan un expire de 3600 segundos (1 hora), que es un buen balance entre eficiencia y confiabilidad.

El parametro RETRY_DELAY del esta plataforma controla cuanto tiempo esperar antes de reintentar un registro que fallo. Cuando el servidor del proveedor no responde al REGISTER o responde con un error, VOS3000 espera el tiempo configurado antes de intentar nuevamente. Un valor de 30-60 segundos es tipico, proporcionando un reintento rapido sin sobrecargar el servidor del proveedor con intentos continuos.

El parametro SEND_UNREGISTER del el softswitch determina si VOS3000 envia un REGISTER con expire=0 cuando se elimina o desactiva un gateway de registro outbound. Esto notifica al proveedor que el registro ya no es valido, liberando recursos en su servidor. Sin este parametro, el registro anterior permaneceria activo hasta su expiracion natural, lo que podria causar problemas si el proveedor intenta enviar trafico a una direccion que ya no esta en uso.

📋 Parametro	📊 Valor Tipico	🔢 Rango	📖 Funcion
EXPIRE	3600s (1 hora)	60-86400s	Tiempo de vida del registro
RETRY_DELAY	30s	10-300s	Espera antes de reintentar
SEND_UNREGISTER	Activado	On/Off	Enviar REGISTER expire=0 al remover

🔒 Cabecera de Privacidad SIP (USER_AGENT_PRIVACY)

El parametro SS_SIP_USER_AGENT_PRIVACY del VOS3000 agrega cabeceras de privacidad a los mensajes REGISTER enviados a los proveedores upstream. Segun el RFC 3323, estas cabeceras indican a los proxies intermedios que oculten la informacion de topologia de red, protegiendo la infraestructura interna del operador.

Cuando el este sistema envia un REGISTER sin privacidad, la cabecera Via contiene la direccion IP real del softswitch, lo que revela informacion sobre la topologia de red interna. Con la privacidad habilitada, se agregan headers como Privacy: id y se pueden ocultar partes de la informacion de ruteo. Esto es especialmente importante cuando se conecta a proveedores que comparten infraestructura con otros operadores, donde la exposicion de informacion de red podria ser explotada.

La activacion de la privacidad en el la plataforma VoIP generalmente no causa problemas de compatibilidad, ya que los proveedores SIP profesionales soportan las cabeceras de privacidad definidas en RFC 3323. Sin embargo, en casos raros, algunos proveedores pueden requerir informacion de topologia para el ruteo correcto, por lo que se recomienda verificar con el proveedor antes de habilitar esta funcion.

🏷️ Reescritura de Dominio Local

La funcion Enable Local Domain Name del el sistema permite reescribir la direccion IP en la cabecera From del mensaje SIP, reemplazandola con un nombre de dominio configurado. Esto es necesario porque algunos proveedores SIP rechazan registros donde el From header contiene una direccion IP numerica en lugar de un dominio, considerandolo no estandar o sospechoso. (Sistema VOS3000 Registro Salida SIP)

Cuando el esta configuracion tiene un dominio local configurado, los mensajes REGISTER envian From: sip:[email protected] en lugar de From: sip:[email protected]. Esto cumple con las mejores practicas SIP y es requerido por muchos carriers internacionales. La configuracion del dominio local requiere que el dominio sea resolvable por DNS, ya que algunos proveedores verifican la resolucion del dominio antes de aceptar el registro. (Sistema VOS3000 Registro Salida SIP)

Para operadores que utilizan direccionamiento IP en su red interna pero necesitan presentarse con un dominio hacia los proveedores, el esta funcion con dominio local es la solucion ideal. La reescritura solo afecta los mensajes salientes hacia los proveedores, sin cambiar el comportamiento interno del softswitch.

📊 Escenario	📋 Sin Dominio Local	📋 Con Dominio Local	🎯 Resultado
From header	sip:[email protected]	sip:[email protected]	Formato profesional
Contact header	IP interna	Dominio resolvable	Mejor compatibilidad
Proveedor rechaza IP	403 Forbidden	200 OK	Registro exitoso

📱 Manejo de Display From SIP (E164_DISPLAY_FROM)

El parametro SS_SIP_E164_DISPLAY_FROM del sistema VOS3000 registro salida SIP controla como se presenta el nombre de display en la cabecera From de los mensajes SIP salientes. Este parametro ofrece tres modos: usar el numero en formato E.164, usar el nombre de display personalizado, o usar el Caller ID configurado en la cuenta.

La presentacion del Caller ID es importante porque algunos proveedores verifican que el formato del numero en el From header cumpla con sus requisitos. El sistema VOS3000 registro salida SIP con el modo E.164 envia el numero en formato internacional estandar (por ejemplo, +1234567890), que es aceptado por la mayoria de los carriers. El modo de nombre personalizado permite usar un alias o nombre comercial en lugar del numero, lo que puede ser util para identificar la fuente de la llamada.

La configuracion del E164_DISPLAY_FROM en el sistema VOS3000 registro salida SIP debe alinearse con los requisitos del proveedor. Algunos carriers requieren estrictamente el formato E.164, otros aceptan cualquier formato, y algunos necesitan que el numero coincida exactamente con los numeros asignados al trunk SIP. Verificar estos requisitos antes de configurar el parametro evita rechazos de llamadas.

🔀 Ruteo SIP Via Contact Header

El parametro SS_SIP_ROUTING_GATEWAY_INVITE_USE_CONTACT del sistema VOS3000 registro salida SIP permite que los mensajes INVITE se ruteen utilizando la cabecera Contact en lugar de la request-line. Esta funcionalidad es critica para resolver problemas de ruteo asimetrico cuando los gateways estan detras de dispositivos NAT.

Cuando un gateway esta detras de NAT, la direccion IP que aparece en la request-line del mensaje SIP es la direccion interna del gateway, que no es alcanzable desde el exterior. Sin embargo, la cabecera Contact puede contener la direccion IP publica del NAT (gracias al mecanismo de binding NAT). El sistema VOS3000 registro salida SIP con ruteo via Contact utiliza esta direccion publica para enviar los mensajes INVITE, resolviendo el problema de ruteo asimetrico.

Esta funcionalidad del sistema VOS3000 registro salida SIP es especialmente util cuando se conecta a proveedores que utilizan gateways detras de NAT o cuando el propio VOS3000 esta detras de un dispositivo NAT. Sin el ruteo via Contact, los INVITEs podrian enviarse a la direccion interna del gateway, que no es alcanzable, causando fallos de llamadas silenciosos.

📋 Transparencia de Cabeceras Extra SIP

La funcionalidad de transparencia de cabeceras del sistema VOS3000 registro salida SIP controla como se manejan las cabeceras SIP personalizadas (X-headers, P-headers) que pasan a traves del softswitch. Los dos modos disponibles son Allow All, que permite pasar todas las cabeceras extra, y Allow Specified, que solo permite las cabeceras explicitamente listadas.

El modo Allow All del sistema VOS3000 registro salida SIP es util para operaciones donde se necesita maxima interoperabilidad con diferentes proveedores y dispositivos. Sin embargo, puede representar un riesgo de seguridad porque permite que cualquier cabecera pase a traves del softswitch, incluyendo cabeceras que podrian revelar informacion interna o interferir con el ruteo.

El modo Allow Specified del sistema VOS3000 registro salida SIP es mas seguro porque solo permite pasar las cabeceras explicitamente listadas en la configuracion. Este modo es recomendado para operaciones donde la seguridad es prioritaria y se conocen exactamente las cabeceras que necesitan pasar. Las cabeceras comunes que se permiten incluyen X-Forwarded-For, P-Asserted-Identity, y cabeceras especificas del proveedor.

📋 Modo	📖 Comportamiento	🎯 Ventaja	⚠️ Riesgo
Allow All	Pasa todas las cabeceras extra	Maxima interoperabilidad	Posible fuga de informacion
Allow Specified	Solo cabeceras listadas	Seguridad controlada	Puede bloquear cabeceras necesarias

📋 Checklist de Configuracion para Proveedores SIP

La configuracion exitosa del VOS3000 requiere verificar multiples parametros que trabajan en conjunto. La siguiente tabla proporciona un checklist paso a paso que cubre desde la configuracion basica hasta la verificacion final. Para asistencia con la configuracion del este sistema, contactenos por WhatsApp al +8801911119966.

🔢 Paso	📋 Accion	📖 Detalle	✅ Verificacion
1	Obtener datos del proveedor	IP, puerto, usuario, password, dominio	Documentar todos los datos
2	Configurar gateway outbound	Registrar tipo SIP con credenciales	Gateway visible en lista
3	Configurar EXPIRE y RETRY	3600s expire, 30s retry	Registrar en Softswitch Parameters
4	Habilitar dominio local	Si el proveedor lo requiere	From header muestra dominio
5	Configurar Display From	E.164 o formato requerido	Caller ID correcto en INVITE
6	Verificar registro exitoso	Buscar 200 OK al REGISTER	Registro activo en el proveedor
7	Realizar llamada de prueba	Verificar audio bidireccional	Llamada exitosa con audio

🔧 Configuracion Paso a Paso del Registro de Salida

Configurar el registro SIP de salida en el sistema VOS3000 registro salida SIP requiere seguir una secuencia especifica de pasos para garantizar que la conexion con el proveedor upstream funcione correctamente. El primer paso es crear la pasarela de salida en la interfaz de administracion de VOS3000, especificando la direccion IP y el puerto del servidor SIP del proveedor. Es fundamental ingresar correctamente las credenciales de autenticacion que el proveedor ha suministrado, incluyendo el nombre de usuario y la contrasena, ya que un error en estos datos impedira el registro exitoso.

El segundo paso en la configuracion del sistema VOS3000 registro salida SIP es definir los parametros de expiracion del registro. El valor de EXPIRE determina cada cuanto tiempo VOS3000 debe renovar el registro con el proveedor upstream. Un valor tipico es 3600 segundos (1 hora), pero algunos proveedores requieren registros mas frecuentes como 1800 segundos o incluso 600 segundos. Si el registro expira sin renovarse, el proveedor eliminara la entrada de su tabla de registros y las llamadas entrantes a traves de esa troncal dejaran de recibirse hasta que el registro se renueve exitosamente.

El tercer paso es configurar el reintento en caso de fallo de registro. El parametro RETRY_DELAY del sistema VOS3000 registro salida SIP especifica cuantos segundos esperar antes de intentar nuevamente el registro si el intento anterior fallo. Un valor recomendado es entre 30 y 60 segundos. Valores muy cortos pueden generar trafico SIP excesivo si el problema es persistente, mientras que valores muy largos pueden dejar la troncal sin servicio durante demasiado tiempo. Algunos administradores configuran valores mas cortos durante el horario laboral y mas largos fuera de horario para optimizar la disponibilidad.

El cuarto paso es habilitar o deshabilitar el envio de UNREGISTER cuando se elimina la pasarela. Cuando SEND_UNREGISTER esta habilitado en el sistema VOS3000 registro salida SIP, VOS3000 envia un mensaje REGISTER con expiracion cero al proveedor antes de eliminar la pasarela, lo que permite que el proveedor libere los recursos asociados a ese registro de manera limpia. Si esta opcion esta deshabilitada, el registro simplemente expirara en el servidor del proveedor cuando alcance su tiempo de vida, lo cual puede dejar entradas stale en la tabla de registros del proveedor durante el periodo de expiracion.

📋 Paso	⚙️ Parametro	📖 Descripcion	📝 Valor Recomendado
1	IP/Port del proveedor	Direccion del servidor SIP upstream	Segun proveedor
2	EXPIRE	Tiempo de vida del registro	3600 segundos
3	RETRY_DELAY	Espera antes de reintentar	30-60 segundos
4	SEND_UNREGISTER	Enviar REGISTER con expiracion 0 al eliminar	Habilitado
5	Local Domain Name	Reescribir IP por dominio en From	Segun requerimiento

❓ Preguntas Frecuentes sobre el Sistema VOS3000 Registro Salida SIP

❓ Como configurar el registro SIP de salida en VOS3000?

Para configurar el registro SIP de salida en el sistema VOS3000 registro salida SIP, primero cree un gateway de tipo SIP en el menu Gateway Management del cliente VOS3000, configurando la direccion IP del proveedor, el puerto SIP, y las credenciales de autenticacion. Luego, en los parametros del gateway, habilite la opcion de registro outbound e indique el nombre de usuario y contrasena proporcionados por el proveedor. Configure EXPIRE (generalmente 3600 segundos), RETRY_DELAY (generalmente 30 segundos), y SEND_UNREGISTER (habilitado). Finalmente, verifique que el registro se completa exitosamente buscando el estado del gateway en el cliente VOS3000 y confirmado que recibe una respuesta 200 OK al REGISTER.

❓ Por que el proveedor rechaza mi registro SIP?

Las razones mas comunes por las que un proveedor rechaza el registro del sistema VOS3000 registro salida SIP incluyen: credenciales incorrectas (usuario o contrasena), direccion IP no autorizada (el proveedor requiere que se registre desde una IP especifica), dominio incorrecto en el From header (algunos proveedores requieren un dominio especifico), formato de numero incorrecto en el Caller ID, y falta de cabeceras requeridas por el proveedor. Para resolver estos problemas, verifique las credenciales con el proveedor, habilite el dominio local si el From header muestra una IP numerica, configure E164_DISPLAY_FROM segun los requisitos del proveedor, y asegurese de que las cabeceras extra necesarias esten permitidas en la configuracion de transparencia. (Sistema VOS3000 Registro Salida SIP)

❓ Que es SEND_UNREGISTER y cuando usarlo?

El parametro SEND_UNREGISTER del sistema VOS3000 registro salida SIP controla si se envia un mensaje REGISTER con expire=0 cuando se elimina o desactiva un gateway de registro outbound. Este mensaje notifica al proveedor que el registro ya no es valido, permitiendo que libere recursos y deje de rutar trafico hacia la direccion previamente registrada. Sin SEND_UNREGISTER, el registro anterior permaneceria activo hasta su expiracion natural, lo que podria causar que el proveedor intente enviar trafico entrante a una direccion que ya no esta en uso. Se recomienda mantener esta opcion habilitada para una limpieza adecuada de los registros. (Sistema VOS3000 Registro Salida SIP)

❓ Cuando necesito habilitar el dominio local?

El dominio local en el sistema VOS3000 registro salida SIP debe habilitarse cuando el proveedor SIP rechaza registros donde el From header contiene una direccion IP numerica en lugar de un nombre de dominio. Muchos carriers internacionales requieren que el From header contenga un dominio resolvable por DNS como parte de sus politicas de seguridad y cumplimiento. Si despues de configurar el registro outbound recibe errores 403 o 401 sin causa aparente, intente habilitar el dominio local y configurar un dominio valido que resuelva a la direccion IP de su servidor VOS3000.

❓ Como resolver problemas de ruteo asimetrico con gateways detras de NAT?

Los problemas de ruteo asimetrico con gateways detras de NAT en el sistema VOS3000 registro salida SIP se resuelven habilitando el parametro SS_SIP_ROUTING_GATEWAY_INVITE_USE_CONTACT. Cuando un gateway esta detras de NAT, la direccion IP en la request-line es la direccion interna, que no es alcanzable desde fuera de la red NAT. Sin embargo, la cabecera Contact puede contener la direccion IP publica del NAT. Al habilitar el ruteo via Contact, los mensajes INVITE se envian a la direccion publica en lugar de la interna, resolviendo el problema de ruteo. Combine esto con la configuracion adecuada de NAT keepalive para mantener abiertos los puertos del dispositivo NAT. (Sistema VOS3000 Registro Salida SIP)

❓ Que cabeceras SIP extra debo permitir?

Las cabeceras SIP extra que debe permitir en el sistema VOS3000 registro salida SIP dependen de los requisitos de su proveedor. Las cabeceras mas comunes que se necesitan pasar incluyen: P-Asserted-Identity (para la presentacion del Caller ID en redes carrier), X-Forwarded-For (para rastrear la IP de origen), y cabeceras especificas del proveedor que se usan para identificacion o ruteo especial. Se recomienda usar el modo Allow Specified y listar solo las cabeceras que el proveedor necesita, en lugar de Allow All que puede representar un riesgo de seguridad. Consulte con su proveedor SIP cuales cabeceras personalizadas requieren. (Sistema VOS3000 Registro Salida SIP)

El la plataforma VoIP es la herramienta esencial para conectar su plataforma con proveedores SIP upstream. Desde la configuracion del registro hasta la gestion de cabeceras, cada parametro contribuye a una conexion estable y compatible. Para asistencia profesional con la implementacion del el sistema, contactenos por WhatsApp al +8801911119966 o visite vos3000.com.

Relacionado: registro SIP y cabeceras | NAT keepalive y puertos | configuracion de pasarelas

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VOS3000 CDR File Rotation, VOS3000 Real-Time CDR Forwarding, VOS3000 CDR Query Blackout, VOS3000 CDR Query Date Range, VOS3000 CDR Text File Export, VOS3000 CDR Pipe Format, VOS3000 CDR Billing Mode Codes, VOS3000 CDR End Direction Critical

VOS3000 CDR End Direction Critical Call Termination Party Detection

April 26, 2026April 26, 2026 king

VOS3000 CDR End Direction Critical Call Termination Party Detection

📞 Knowing who hung up the call is not just a curiosity — it is a critical data point that affects billing disputes, quality analysis, fraud detection, and network performance optimization. The VOS3000 CDR end direction field records exactly which party initiated the call termination: the caller (0), the callee (1), or the VOS3000 server itself (2). This three-code system, documented in the official VOS3000 manual §4.4 (page 242), provides the definitive answer to “who ended this call?” — and that answer has far-reaching implications for your VoIP business. 🔍

⚙️ Consider the billing dispute scenario: A customer claims they were overcharged because “the call dropped after only a few seconds.” Without the endDirection field, you have no way to prove whether the customer hung up normally, the far end hung up, or the server terminated the call due to a timeout or balance exhaustion. With endDirection = 2 (server), you can explain that the server terminated the call because the prepaid balance was depleted — resolving the dispute with evidence. Without it, you are relying on guesswork. 📊

🎯 This guide provides a comprehensive reference for the VOS3000 CDR end direction field, covering all three codes (0, 1, 2), their meanings, how they interact with other CDR fields like endReason and billingMode, and practical analysis techniques for using end direction data in billing, quality monitoring, and security applications. All definitions are sourced from the official VOS3000 2.1.8.0/2.1.9.07 English manual §4.4 (page 242). 📘

🔐 What Is VOS3000 CDR End Direction?

📋 The VOS3000 CDR end direction (also called “hangup side” in the manual) is Field 7 in the pipe-delimited CDR format. It records which party initiated the termination of the call by sending the SIP BYE message, H.323 EndSessionCommand, or equivalent call teardown signal. This is not about which party originated the call — it is specifically about which party ended it.

📍 CDR field location: Position 7 in the pipe-delimited CDR format, between the endReason (Field 6) and callerGatewayId (Field 8) fields, as documented in the VOS3000 manual §4.4.

📋 Official Manual Definition

📖 The VOS3000 2.1.8.0/2.1.9.07 English manual §4.4 (page 242) defines the endDirection field as:

“endDirection — Hangup side（0-caller，1-callee，2-server）”

📝 This is the complete and official definition. The three possible values and their meanings are:

Code	Party	Meaning	SIP Signal
0	🔔 Caller	The calling party initiated the hangup	BYE from caller side
1	📞 Callee	The called party initiated the hangup	BYE from callee side
2	🖥️ Server	The VOS3000 server initiated the hangup	BYE generated by VOS3000

📊 End Direction Code 0: Caller Hangup

🔔 When the VOS3000 CDR end direction is 0, it means the calling party initiated the call termination. In SIP terms, the BYE message originated from the caller’s side of the call leg. This is the most common end direction for normal completed calls — the person who made the call decides they are done talking and hangs up.

Attribute	Detail
📌 Code	0
📝 Party	Caller (calling party)
🔄 Typical Scenario	Normal call completion — caller hangs up after conversation
📊 Expected Proportion	50–80% of connected calls in most deployments

📋 Analysis Implications of Caller Hangup

💡 What caller hangup tells you: When endDirection = 0, the call followed a normal pattern — the calling party placed the call, the conversation took place, and the caller ended it when finished. This is the expected behavior for the majority of outbound calls. However, if you notice an unusually high percentage of caller hangups with very short hold times (under 3 seconds), it may indicate that callers are reaching the wrong number or encountering audio problems and hanging up immediately.

📊 Quality correlation: Pair endDirection = 0 with short holdTime values to identify potential audio quality issues. If callers consistently hang up within the first few seconds, there may be a one-way audio problem or incorrect number routing. Cross-reference with the endReason codes to get the full picture — a normal SIP 200 OK with endDirection = 0 and holdTime under 2000ms suggests a quick hangup after audio issues rather than a failed call.

📊 End Direction Code 1: Callee Hangup

📞 When the VOS3000 CDR end direction is 1, it means the called party initiated the call termination. The BYE message came from the callee’s side. This typically happens when the person who received the call decides to end the conversation.

Attribute	Detail
📌 Code	1
📝 Party	Callee (called party)
🔄 Typical Scenario	Called party hangs up after conversation ends
📊 Expected Proportion	15–40% of connected calls in most deployments

📋 Analysis Implications of Callee Hangup

💡 What callee hangup tells you: An endDirection of 1 is perfectly normal for many call scenarios — the called party simply ends the conversation. However, a high proportion of callee hangups, especially combined with short hold times, may indicate that the called parties are not expecting the call (possible spam or unsolicited traffic), or that the audio from the caller side is not reaching the callee properly.

🔍 Wholesale traffic quality indicator: In wholesale VoIP operations, monitoring the ratio of callee hangups to caller hangups on specific routes helps assess traffic quality. A route with a high percentage of callee hangups and short durations may indicate that the terminating carrier’s end users are rejecting or quickly ending calls — a sign of potential CLI (Caller Line Identification) issues or unwanted traffic. This data supports decisions about route optimization and carrier selection.

📊 End Direction Code 2: Server Hangup

🖥️ When the VOS3000 CDR end direction is 2, it means the VOS3000 server itself initiated the call termination. This is the most operationally significant of the three codes, because it indicates the softswitch actively intervened to end the call — and the reasons for that intervention directly impact billing, customer experience, and system health. 🚨

Attribute	Detail
📌 Code	2
📝 Party	Server (VOS3000 softswitch)
🔄 Typical Scenario	Server-initiated call termination for policy, timeout, or balance reasons
📊 Expected Proportion	5–20% of connected calls, depending on prepaid ratio

📋 When Does Server Hangup Occur?

🖥️ There are several important scenarios where VOS3000 terminates a call from the server side, each with different operational implications:

Scenario	Description	End Reason	Impact
💰 Balance exhaustion	Prepaid account runs out of funds during active call	Various (may show session timeout code)	Customer may dispute charges
⏱️ Session timer expiry	SIP session timer expires without successful re-INVITE refresh	200 (normal) or 408	Call duration capped by timer
🔧 Administrative disconnect	Operator manually disconnects the call via VOS3000 client	200	Immediate call termination
📡 No-media timeout	RTP media stream stops flowing for the configured timeout period	Various	Detects dead calls consuming resources
🛡️ Maximum duration limit	Call exceeds the configured maximum call duration	200	Policy-based call length cap
🔄 Gateway failover cleanup	Server terminates call during gateway switching or failover process	503 or other error	Call may be re-routed

💡 Recording server hangups: Whether CDRs for server-initiated hangups are recorded depends on the SERVER_BILLING_RECORD_SERVER_HANG_UP parameter. When this parameter is On, VOS3000 generates CDR records even when the server initiates the hangup, providing a complete audit trail of all call terminations. When Off, server-initiated hangups may not generate CDR records, creating gaps in your billing and operational data. For detailed configuration guidance, see our server hangup CDR recording guide.

📋 End Direction and Billing Dispute Resolution

💰 The VOS3000 CDR end direction field is one of the most powerful tools for resolving billing disputes. When a customer challenges a charge, the endDirection code provides objective evidence of what happened during the call:

Dispute Claim	End Direction	Resolution
“The call dropped after a few seconds”	0 (caller hangup)	✅ The caller (customer) hung up normally — not a dropped call
“I was disconnected unexpectedly”	2 (server hangup)	⚠️ Server terminated — investigate balance exhaustion or session timeout
“The call was much shorter than billed”	1 (callee hangup)	✅ The called party hung up — duration matches CDR holdTime
“I never made this call”	0 (caller hangup) with specific callerIp	🔍 Verify the callerIp matches the customer’s registered device

📊 Evidence chain: For maximum dispute resolution effectiveness, combine the endDirection field with other CDR fields. The endReason code tells you why the call ended, the holdTime tells you how long the conversation lasted, the callerIp confirms where the call originated, and the endDirection tells you who terminated the call. Together, these four fields create an unambiguous evidence chain that resolves most billing disputes. For detailed CDR analysis methodology, see our CDR billing discrepancy guide.

📊 End Direction and Call Quality Analysis

📈 Analyzing end direction patterns across your traffic reveals important quality trends that are not visible from ASR and ACD metrics alone. Here are the key analysis patterns to monitor:

📋 End Direction Distribution Analysis

Pattern	End Direction Mix	Indicates	Action
✅ Normal distribution	60% caller, 30% callee, 10% server	Healthy traffic with normal call patterns	No action needed — continue monitoring
⚠️ High server hangup	Server hangup over 25%	Session timeouts, balance exhaustion, or system issues	Check session timer and prepaid balance settings
🔍 Short callee hangup	Callee hangup with holdTime under 5s	Called parties rejecting calls — possible CLI or spam issue	Review caller ID presentation and traffic source
🚨 Short caller hangup	Caller hangup with holdTime under 3s	One-way audio or wrong number — callers hanging up immediately	Check audio quality on affected routes

📋 End Direction by Gateway Analysis

📡 Segmenting end direction data by gateway (using the callerGatewayId and calleeGatewayId fields) reveals gateway-specific quality issues. A gateway that shows an unusually high percentage of server-initiated hangups (endDirection = 2) may have connectivity problems causing session timer expirations. A gateway with a high proportion of short-duration callee hangups may be routing traffic to low-quality destinations where end users reject the calls. This gateway-level analysis supports data-driven routing decisions and helps you identify which carriers deliver the best call completion quality. For gateway performance monitoring techniques, see our gateway analysis reports guide.

📋 End Direction and Session Timer Interaction

⏱️ One of the most important operational interactions is between the VOS3000 CDR end direction and the SIP session timer system. When session timers are enabled, VOS3000 periodically sends re-INVITE messages to refresh the session. If the re-INVITE fails (the endpoint does not respond), VOS3000 terminates the call — and the endDirection will be 2 (server). This is a common scenario for calls that “mysteriously drop” after a fixed interval.

Session Timer Scenario	End Direction	End Reason	Resolution
✅ Re-INVITE succeeds	0 or 1 (normal)	200 OK	Call continues until party hangs up
⚠️ Re-INVITE fails (NAT issue)	2 (server)	408 or timeout	Check NAT keepalive settings
🔧 No session timer support	2 (server)	Session expiry	Configure SS_SIP_NO_TIMER_REINVITE_INTERVAL
💰 Prepaid balance depleted	2 (server)	200 OK (normal clear)	Expected behavior for prepaid accounts

💡 Investigating mysterious drops: If customers report calls dropping at consistent intervals (e.g., always at 30 minutes or 2 hours), check the SIP session timer configuration. The session timer interval, combined with the SS_SIP_SESSION_UPDATE_SEGMENT parameter, determines when VOS3000 sends re-INVITE refreshes. If the endpoint does not support session timers and SS_SIP_NO_TIMER_REINVITE_INTERVAL is not configured, VOS3000 may terminate the call after the session timer expires — resulting in endDirection = 2.

🛡️ Common End Direction Analysis Problems and Solutions

❌ Problem 1: Excessive Server Hangups (endDirection = 2)

🔍 Symptom: A high percentage of CDRs show endDirection = 2, indicating the server is terminating many calls.

💡 Cause: Multiple factors can cause excessive server hangups: session timer misconfiguration, NAT traversal failures causing re-INVITE timeouts, prepaid accounts frequently running out of balance, or RTP timeout detecting dead media streams.

✅ Solutions:

⏱️ Review SIP session timer settings — ensure SS_SIP_NO_TIMER_REINVITE_INTERVAL provides a safety net for non-timer endpoints
🌐 Check NAT keepalive settings — failed re-INVITEs through NAT firewalls are a leading cause of server-initiated hangups
💰 Verify prepaid balance thresholds — the mid-call balance warning should alert users before their balance is depleted
📡 Monitor RTP timeout settings that may be too aggressive for legitimate silent periods in calls

❌ Problem 2: Billing Disputes Where Customer Claims Call Dropped

🔍 Symptom: Customer disputes a charge, claiming the call dropped unexpectedly, but the CDR shows endDirection = 0 (caller hangup) with a substantial holdTime.

💡 Cause: The customer may have accidentally ended the call, or their SIP device may have sent a BYE due to a local issue (not a server-side drop). The CDR end direction provides the objective evidence.

✅ Solutions:

📋 Present the endDirection = 0 record to the customer as evidence that their device initiated the hangup
🔍 Cross-reference with callerIp to confirm the call originated from the customer’s registered device
📊 Compare the holdTime with the customer’s claim about call duration
📞 For endDirection = 2 cases, explain the server termination reason (balance exhaustion, session timeout, etc.)

❌ Problem 3: Short Callee Hangups Indicating Traffic Quality Issues

🔍 Symptom: High volume of endDirection = 1 records with very short holdTime values on a specific route or gateway.

💡 Cause: The called parties are answering and immediately hanging up. This can indicate wrong-number calls, CLI (Caller Line Identification) not being presented correctly, or the traffic being perceived as spam by the called parties.

✅ Solutions:

📞 Verify that the caller ID being presented to the called party is correct and recognizable
🔧 Check the caller ID management configuration for the affected mapping gateway
📊 Analyze the geographic distribution of short callee hangups to identify specific regions or carriers with quality issues
🔄 Consider routing adjustments to avoid low-quality termination carriers

💡 End Direction Best Practices

🎯 Follow these best practices to maximize the value of VOS3000 CDR end direction data in your operations:

Best Practice	Recommendation	Reason
📋 Always enable server hangup CDR recording	Set SERVER_BILLING_RECORD_SERVER_HANG_UP = On	🔍 Complete audit trail of all call terminations
📊 Monitor end direction distribution weekly	Track % of codes 0, 1, 2 across all traffic	📈 Early detection of quality and configuration issues
💰 Use end direction in billing dispute workflows	Include endDirection in dispute resolution SOP	🛡️ Objective evidence resolves disputes faster
📡 Segment by gateway for quality analysis	Analyze end direction per routing gateway	🔧 Data-driven carrier selection and route optimization
⏱️ Correlate endDirection = 2 with session timer	Match server hangups to timer expiry patterns	🔧 Identifies NAT and timer configuration problems

❓ Frequently Asked Questions

❓ What does VOS3000 CDR end direction 2 mean?

🖥️ A VOS3000 CDR end direction of 2 means the VOS3000 server initiated the call termination. This occurs when the softswitch actively ends the call, rather than either endpoint (caller or callee) hanging up. Common reasons include: prepaid account balance exhaustion (the server terminates the call when funds run out), SIP session timer expiry (the server did not receive a successful re-INVITE refresh), administrative disconnect by the operator, maximum call duration limit reached, or RTP media timeout detecting a dead media stream. The endDirection = 2 code is documented in the VOS3000 manual §4.4 (page 242) as “server” hangup side.

❓ How do I determine why a server hangup occurred?

🔍 To determine the specific reason for a server-initiated hangup (endDirection = 2), cross-reference the endDirection field with the endReason field (Field 6) in the same CDR record. The endReason provides the SIP response code or cause code that explains why the call was terminated. For example, endDirection = 2 with endReason = 200 typically indicates a normal server-initiated clear (such as balance exhaustion or maximum duration). EndDirection = 2 with endReason = 408 indicates a timeout. Combining these two fields gives you the complete picture of who ended the call and why.

❓ Does endDirection affect billing calculations?

💰 The endDirection field itself does not directly change billing calculations — the holdTime field determines the billable duration regardless of who hung up. However, endDirection has indirect billing implications. When endDirection = 2 (server hangup), the call may have been terminated before the natural conversation end, which can lead to customer disputes. When analyzing billing data, filtering by endDirection helps you understand the nature of your call completions and identify patterns that affect revenue, such as premature server terminations due to balance exhaustion on prepaid accounts.

❓ Can the endDirection value be incorrect?

🔧 In rare cases, the endDirection may not accurately reflect the true termination party. This can happen when a SIP ALG (Application Layer Gateway) or intermediate proxy modifies the BYE message direction, or when a gateway sends a BYE on behalf of an endpoint (making it appear as a callee hangup when the caller actually hung up). If you suspect endDirection inaccuracy, enable SIP debug tracing to capture the actual BYE message flow and verify which IP address sent the termination signal. Check our SIP debug guide for instructions on capturing and analyzing SIP message traces.

❓ How is endDirection different from endReason in VOS3000 CDR?

📋 The endDirection field (Field 7) tells you who terminated the call — caller (0), callee (1), or server (2). The endReason field (Field 6) tells you why the call was terminated — using SIP response codes (200, 486, 503, etc.) or Q.850 cause codes. These two fields answer different questions and must be analyzed together for the complete picture. For example, endDirection = 0 with endReason = 200 means the caller hung up normally. EndDirection = 2 with endReason = 200 means the server terminated the call normally (likely due to balance exhaustion or duration limit). EndDirection = 1 with endReason = 486 means the callee rejected the call with a busy signal.

❓ Should I always record CDRs for server-initiated hangups?

📝 Yes, it is strongly recommended to record CDRs for server-initiated hangups by setting SERVER_BILLING_RECORD_SERVER_HANG_UP = On. Without these records, your CDR data has gaps — you lose visibility into calls that the server terminated, which are often the most operationally significant calls (balance exhaustion, session timeouts, administrative actions). These records are essential for billing dispute resolution, quality analysis, and system health monitoring. The zero-duration CDR control parameter (SERVER_BILLING_RECORD_ZERO_HOLD_TIME) serves a different purpose — it controls whether failed call attempts are recorded, while SERVER_BILLING_RECORD_SERVER_HANG_UP specifically addresses server-initiated terminations.

📞 Need Expert Help with VOS3000 CDR End Direction?

🔧 Understanding and analyzing VOS3000 CDR end direction data is essential for billing accuracy, quality monitoring, and operational intelligence. Whether you are investigating server-initiated hangups, resolving billing disputes, or building a call quality dashboard, expert guidance ensures your analysis is accurate and actionable. 📊

💬 WhatsApp: +8801911119966 — Get immediate assistance with VOS3000 CDR end direction analysis, billing dispute resolution, and call quality monitoring. Our team specializes in VOS3000 CDR analytics, billing system optimization, and VoIP quality assurance. 🔧

🔗 Explore related VOS3000 CDR and call quality guides:

VOS3000 Call Termination Reasons — Complete reference for endReason codes that complement endDirection analysis
VOS3000 Server Hangup CDR — Configuring SERVER_BILLING_RECORD_SERVER_HANG_UP for complete audit trails
VOS3000 CDR Analysis and Billing — Comprehensive CDR analysis methodology for revenue optimization
VOS3000 Zero Duration CDR — Managing zero-duration call records during attacks and normal operations
VOS3000 Session Timer — SIP session timer configuration that affects server-initiated hangups
VOS3000 ASR ACD Analysis — Using ASR and ACD metrics alongside end direction for quality assessment

📞 Need Professional VOS3000 Setup Support?

For professional VOS3000 installations and deployment, VOS3000 Server Rental Solution:

📱 WhatsApp: +8801911119966
🌐 Website: www.vos3000.com
🌐 Blog: multahost.com/blog
📥 Downloads: VOS3000 Downloads

VOS3000 CDR Text File Export Complete Pipe-Delimited Format Best Guide

April 26, 2026April 26, 2026 king

VOS3000 CDR Text File Export Complete Pipe-Delimited Format Guide

📊 Every VoIP operator needs reliable call data — and the VOS3000 CDR text file export is the backbone of billing accuracy, traffic analysis, and regulatory compliance. When enabled, VOS3000 generates pipe-delimited text files containing every call detail record, ready for ingestion by external billing systems, analytics platforms, and fraud detection tools. Yet many operators never configure this powerful feature correctly, leaving critical data trapped inside the VOS3000 database with no external backup or integration path. 📁

⚙️ The two parameters that control this entire process — SS_CDR_RECORD_TO_FILE and SS_CDR_RECORD_NONCONNECT — are straightforward to configure, but their implications for disk space, data completeness, and billing accuracy are often misunderstood. Setting SS_CDR_RECORD_TO_FILE to On creates an hourly CDR text file in the softswitch’s cdr/ directory, while SS_CDR_RECORD_NONCONNECT determines whether zero-duration calls (failed attempts, busy signals, no-answer) are included in that export. The difference between having these records and not having them can mean the difference between catching a fraud pattern early and discovering it weeks too late. 🔍

🎯 This guide provides a complete walkthrough of the VOS3000 CDR text file export system: how to enable it, how the pipe-delimited format is structured, how file naming and rotation work, and how to integrate the exported data with external systems. All parameter details are sourced from the official VOS3000 2.1.8.0/2.1.9.07 English manual, §4.3.5.1 (page 225) and §4.4 (pages 241–243). 📘

🔐 What Is VOS3000 CDR Text File Export?

📁 The VOS3000 CDR text file export is a softswitch-level feature that writes call detail records to flat text files on the server filesystem. Unlike CDR records stored in the MySQL database — which require the VOS3000 client or web interface to query — text file exports provide a continuous, externally accessible stream of call data that can be consumed by any system capable of parsing pipe-delimited text. 📋

💡 Why text file export matters:

🔄 External billing integration: Feed CDR data directly into third-party billing platforms without database access
🛡️ Backup redundancy: Maintain a file-based CDR copy independent of the MySQL database
📊 Analytics pipeline: Pipe-delimited files are easily consumed by Python, Excel, BigQuery, and custom tools
🔍 Fraud detection: Real-time or near-real-time CDR analysis on exported files catches anomalies faster
📋 Regulatory compliance: Many telecom regulators require CDR archival in a portable, non-proprietary format
🔗 System migration: Export historical CDR data when migrating to a new billing or CRM system

📍 Parameter location in VOS3000 Client: Operation management → Softswitch management → Additional settings → Softswitch parameter

📋 SS_CDR_RECORD_TO_FILE — The Master Switch

🔧 SS_CDR_RECORD_TO_FILE is the primary parameter that enables or disables the entire text file CDR export. When set to On, VOS3000 creates hourly text files containing all CDR records in pipe-delimited format.

Attribute	Value
📌 Parameter Name	SS_CDR_RECORD_TO_FILE
🔢 Default Value	Off
⚙️ Valid Values	On / Off
📝 Description	Save CDR as TXT (per VOS3000 manual §4.3.5.1, page 225)
📍 Location	Operation management → Softswitch management → Additional settings → Softswitch parameter

⚠️ Critical note: This parameter is Off by default. Many VOS3000 deployments run for years without CDR text file export enabled, which means no file-based CDR backup exists. If the MySQL database becomes corrupted or the server experiences a disk failure, all historical CDR data stored only in the database may be lost. Enabling SS_CDR_RECORD_TO_FILE provides a critical safety net.

📋 SS_CDR_RECORD_NONCONNECT — Zero-Duration Call Export

📞 SS_CDR_RECORD_NONCONNECT controls whether non-connected calls — those with zero hold time — are included in the text file export. This includes busy signals, no-answer attempts, failed calls, and other call attempts that never established a two-way audio path.

Attribute	Value
📌 Parameter Name	SS_CDR_RECORD_NONCONNECT
🔢 Default Value	Off
⚙️ Valid Values	On / Off
📝 Description	When saving CDR as TXT, contains CDR which hold time is 0s (per VOS3000 manual §4.3.5.1, page 225)
📍 Location	Operation management → Softswitch management → Additional settings → Softswitch parameter

💡 Why you might want non-connected CDRs: While zero-duration calls generate no revenue, they carry essential operational intelligence. High volumes of busy signals from a specific gateway may indicate capacity problems. Repeated no-answer attempts to a destination could signal a routing misconfiguration. Patterns of failed calls from unauthorized IPs — tracked by SS_CDR_RECORD_ILLEGAL — are often the first sign of toll fraud. Without SS_CDR_RECORD_NONCONNECT enabled, all of this intelligence is excluded from your text file export.

📁 CDR Text File Naming and Storage

📂 When SS_CDR_RECORD_TO_FILE is enabled, VOS3000 creates CDR text files in the cdr/ directory under the VOS3000 installation path. The naming convention follows a precise hourly pattern documented in the official manual §4.4 (page 241):

📋 File Naming Convention

Attribute	Detail
📐 Format	YYYYMMDDHH.txt
📁 Directory	cdr/ under VOS3000 installation path
⏰ Granularity	One file per hour
📝 Example	2013103112.txt contains CDRs ending between 12:00:00 and 12:59:59

🔍 How the hourly file system works: Each CDR is written to the file corresponding to the hour in which the call ended (stop time). A call that starts at 11:45 and ends at 12:10 will be recorded in the 12:00 hour file, not the 11:00 hour file. This means each file contains a self-contained set of CDRs that can be processed independently without worrying about time-overlap between files.

📋 CDR File Rotation and Retention

🔄 VOS3000 manages CDR text file rotation using two server-level parameters that control how long files are retained and how many are kept on disk:

Parameter	Default	Range	Purpose
SERVER_CDR_FILE_WRITE_INTERVAL	None	60–86400 seconds	Time interval for creating new CDR files
SERVER_CDR_FILE_WRITE_MAX	2048	10–4096 files	Maximum number of CDR files retained on disk

📊 Disk space planning: With the default SERVER_CDR_FILE_WRITE_MAX of 2048 files and one file per hour, VOS3000 retains approximately 85 days of CDR text files. For high-traffic systems, monitor disk usage closely — each hourly file can range from a few KB on a low-traffic system to hundreds of MB on a system processing thousands of concurrent calls. To learn more about CDR file rotation and backup strategies, see our guide on VOS3000 CDR analysis and billing.

📊 Pipe-Delimited CDR Format Overview

🔗 Each line in the VOS3000 CDR text file represents one call detail record, with fields separated by the pipe character (|). The format is documented in the official VOS3000 manual §4.4 (pages 241–243). Understanding this format is essential for parsing CDR data into external systems.

📋 CDR Line Format Structure

callerE164|calleeE164|startTime|stopTime|holdTime|endReason|
endDirection|callerGatewayId|calleeGatewayId|callerIp|calleeIp|
callerAccessE164|calleeAccessE164|callerToGatewayE164|
calleeToGatewayE164|calleeBilling|billingMode|callerPdd|calleePdd

📝 Field count note: The VOS3000 manual §4.4 documents the pipe-delimited format with 18 pipe separators, resulting in 19 columns of data. The first 18 fields (through billingMode) are the core CDR fields present in all versions, while the callerPdd and calleePdd fields provide Post-Dial Delay metrics that were added in later revisions of the software.

📋 Key CDR Fields at a Glance

#	Field	Description	Example
1	callerE164	The caller ID	12125551234
2	calleeE164	The callee ID	18005559876
3	startTime	Call begin time	2018-12-20 11:20:18
4	stopTime	Call end time	2018-12-20 16:34:09
5	holdTime	Call duration in milliseconds	45000
6	endReason	End reason code	200
7	endDirection	Hangup side (0=caller, 1=callee, 2=server)	0
17	billingMode	Charge mode (-1=no billing, 0=phone, 1=gateway, 3=phone card)	0

🔑 Key observations: The holdTime field records call duration in milliseconds, not seconds. This is critical for billing calculations — a holdTime of 45000 means 45 seconds, not 45000 seconds. The endDirection field identifies who terminated the call (caller, callee, or server), which is essential for call termination analysis. The billingMode field determines how the call was charged and whether billing was applied at all.

⚙️ Step-by-Step VOS3000 CDR Text File Export Configuration

🖥️ Follow these steps to enable and configure the VOS3000 CDR text file export on your softswitch:

Step 1: Enable CDR Text File Export 📁

🔐 Log in to VOS3000 Client with administrator credentials
📌 Navigate: Operation management → Softswitch management → Additional settings → Softswitch parameter
🔍 Locate SS_CDR_RECORD_TO_FILE in the parameter list
✏️ Change the value from Off to On
💾 Click Save to apply the configuration

⚠️ Important: After enabling SS_CDR_RECORD_TO_FILE, VOS3000 will begin writing CDR text files starting from the next hourly interval. Historical CDR data from before the parameter was enabled is not retroactively exported. If you need historical data, use the CDR query interface in the VOS3000 client to export it manually, as described in our CDR analysis guide.

Step 2: Configure Non-Connected Call Recording 📞

📋 In the same Softswitch parameter section, locate SS_CDR_RECORD_NONCONNECT
✏️ Change the value from Off to On if you need zero-duration call records in the export
💾 Save the configuration

💡 Recommendation: Enable SS_CDR_RECORD_NONCONNECT for most deployments. The additional disk space consumed by zero-duration CDRs is minimal compared to the operational value they provide. However, during a DDoS or flood attack, the volume of zero-duration CDRs can spike dramatically. If disk space is a concern during such events, you can temporarily disable this parameter to prevent disk overflow.

Step 3: Configure File Rotation Parameters 🔄

📋 Navigate: Operation management → Server management → Server parameter
🔍 Review SERVER_CDR_FILE_WRITE_INTERVAL — set the hourly interval for new file creation (default: one file per hour)
🔍 Review SERVER_CDR_FILE_WRITE_MAX — set the maximum number of CDR files to retain (default: 2048)
💾 Save and restart the VOS3000 service for changes to take effect

Scenario	WRITE_INTERVAL	WRITE_MAX	Result
✅ Default (most deployments)	3600 (1 hour)	2048	~85 days of CDR files retained
📊 High-traffic analytics	1800 (30 min)	4096	~85 days with finer granularity
💾 Low disk space	3600 (1 hour)	720	~30 days of retention
🛡️ Long-term compliance	3600 (1 hour)	4096	~170 days of retention

🛡️ Another important softswitch parameter that affects CDR text file content is SS_CDR_RECORD_ILLEGAL. This parameter controls whether CDRs are generated for calls originating from unauthorized IP addresses — calls that VOS3000 rejects as illegal or unauthorized.

Attribute	Value
📌 Parameter Name	SS_CDR_RECORD_ILLEGAL
🔢 Default Value	On
📝 Description	Record illegal call (per VOS3000 manual §4.3.5.1, page 225)

🔒 Unlike SS_CDR_RECORD_NONCONNECT (which defaults to Off), SS_CDR_RECORD_ILLEGAL defaults to On. This means VOS3000 is configured by default to record CDRs for hack attempts and unauthorized call attempts. These records appear in the text file export with a special billing mode code of -1 (no billing), making them easy to filter and analyze separately. For more details on how VOS3000 handles unauthorized calls, see our guide on illegal call detection and prevention.

🛠️ Parsing VOS3000 CDR Text Files for External Systems

📊 Once the VOS3000 CDR text file export is configured, the next step is integrating the exported data with your external systems. The pipe-delimited format is universally supported by programming languages, databases, and analytics tools.

📋 Parsing Methods Comparison

Method	Best For	Complexity	Real-Time
🐍 Python script	Custom analytics, billing import	Medium	Near-real-time (cron)
🗄️ MySQL LOAD DATA	Database import, reporting	Low	Batch (hourly)
📊 Excel/CSV conversion	Manual review, one-time analysis	Low	Manual
🔄 Logstash/Fluentd	Elasticsearch, SIEM integration	High	Near-real-time

📋 Python Parsing Example

import csv

# VOS3000 CDR field names (per manual §4.4)
CDR_FIELDS = [
    'callerE164', 'calleeE164', 'startTime', 'stopTime',
    'holdTime', 'endReason', 'endDirection',
    'callerGatewayId', 'calleeGatewayId',
    'callerIp', 'calleeIp',
    'callerAccessE164', 'calleeAccessE164',
    'callerToGatewayE164', 'calleeToGatewayE164',
    'calleeBilling', 'billingMode',
    'callerPdd', 'calleePdd'
]

def parse_cdr_file(filepath):
    """Parse VOS3000 CDR text file into list of dictionaries."""
    records = []
    with open(filepath, 'r') as f:
        reader = csv.reader(f, delimiter='|')
        for row in reader:
            if len(row) >= 17:  # Minimum core fields
                record = dict(zip(CDR_FIELDS[:len(row)], row))
                records.append(record)
    return records

# Usage: Parse a CDR file and filter connected calls
cdr_data = parse_cdr_file('/home/vos3000/cdr/2026042612.txt')
connected = [r for r in cdr_data if int(r.get('holdTime', 0)) > 0]
print(f"Total CDRs: {len(cdr_data)}, Connected: {len(connected)}")

🛡️ Common VOS3000 CDR Text File Export Problems and Solutions

⚠️ Misconfigurations and misunderstandings about the CDR text file export can lead to data loss, disk space issues, or incomplete records. Here are the most common problems and their solutions:

❌ Problem 1: No CDR Text Files Being Generated

🔍 Symptom: The cdr/ directory is empty or does not contain the expected hourly text files.

💡 Cause: SS_CDR_RECORD_TO_FILE is still set to Off (the default value). Many operators assume CDR files are generated automatically, but this feature must be explicitly enabled.

✅ Solution:

🔧 Navigate to Softswitch parameter and set SS_CDR_RECORD_TO_FILE = On
💾 Save the configuration and wait for the next hourly interval
📁 Verify the cdr/ directory exists and has proper write permissions
📋 Confirm with the VOS3000 system parameter guide that no other settings are blocking file creation

❌ Problem 2: Missing Zero-Duration Call Records

🔍 Symptom: The CDR text files only contain records for connected calls. Failed calls, busy signals, and no-answer attempts are absent.

💡 Cause: SS_CDR_RECORD_NONCONNECT is set to Off (default), which excludes zero-duration calls from the text file export.

✅ Solution:

📞 Set SS_CDR_RECORD_NONCONNECT = On in Softswitch parameter
📊 Be aware this increases file sizes — monitor disk usage after enabling
🔍 For fraud detection purposes, this setting is strongly recommended

❌ Problem 3: Disk Space Exhaustion from CDR Files

🔍 Symptom: The server runs low on disk space, and the cdr/ directory contains thousands of large CDR text files.

💡 Cause: SERVER_CDR_FILE_WRITE_MAX is set too high, or an external script is not archiving and cleaning up old CDR files.

✅ Solution:

🔄 Reduce SERVER_CDR_FILE_WRITE_MAX to a lower value (e.g., 720 for ~30 days)
📁 Implement a cron job to move CDR files older than X days to archive storage
📊 Monitor disk usage with the VOS3000 disk alarm feature
💾 Consider compressing older CDR files with gzip to save space

❌ Problem 4: Parsing Errors Due to Extra Pipe Characters

🔍 Symptom: External parsing scripts produce incorrect field alignment or data corruption.

💡 Cause: Caller or callee E164 fields contain unexpected characters, or the number of pipe separators varies between CDR records.

✅ Solution:

🔧 Use a robust parser that handles variable field counts gracefully
📋 Always validate the number of fields per line before processing
📊 Reference the official VOS3000 manual §4.4 (page 241) for the exact field specification

💡 VOS3000 CDR Text File Export Best Practices

🎯 Follow these best practices to get the most from your VOS3000 CDR text file export configuration:

Best Practice	Recommendation	Reason
📁 Always enable SS_CDR_RECORD_TO_FILE	Set to On	✅ Provides file-based CDR backup independent of MySQL
📞 Enable SS_CDR_RECORD_NONCONNECT	Set to On for most deployments	🔍 Captures failed call data for fraud detection and quality analysis
🔄 Archive CDR files regularly	Move files older than 30 days to archive	💾 Prevents disk space exhaustion on active server
📊 Validate CDR data daily	Check record counts and file sizes	🛡️ Early detection of data export problems
🔒 Set proper file permissions	Restrict cdr/ directory access	🔐 CDR files contain sensitive call data and IP addresses
📡 Consider real-time forwarding	Use SERVER_CDR_REAL_TIME_REPORT_SERVER	⚡ For immediate CDR delivery to external billing systems

💡 Pro tip: The VOS3000 CDR text file export works best as part of a comprehensive data strategy. Combine the text file export with the VOS3000 billing system for complete revenue tracking, and use the exported data to build custom dashboards that go beyond what the VOS3000 client interface provides. For operators who need real-time CDR delivery rather than hourly file batches, the SERVER_CDR_REAL_TIME_REPORT_SERVER parameter provides an alternative integration path.

📊 Complete VOS3000 CDR Export Parameter Reference

📋 Here is the complete reference table for all parameters related to CDR text file export, sourced from the official VOS3000 2.1.8.0/2.1.9.07 English manual:

Parameter	Default	Category	Purpose
SS_CDR_RECORD_TO_FILE	Off	Softswitch	Enable CDR text file export
SS_CDR_RECORD_NONCONNECT	Off	Softswitch	Include zero-duration calls in export
SS_CDR_RECORD_ILLEGAL	On	Softswitch	Record illegal/unauthorized call CDRs
SERVER_CDR_FILE_WRITE_INTERVAL	None	Server	CDR file creation interval (60–86400 seconds)
SERVER_CDR_FILE_WRITE_MAX	2048	Server	Maximum CDR files retained (10–4096)
SERVER_CDR_REAL_TIME_REPORT_SERVER	(blank)	Server	Real-time CDR forwarding server address
SERVER_QUERY_CDR_DENY_TIME	(blank)	Server	No CDR query time (blackout hours)
SERVER_QUERY_CDR_MAX_DAY_INTERVAL	31	Server	Maximum CDR query date range (days)
SERVER_MAX_CDR_PENDING_LIST_LENGTH	100000	Server	CDR queue length limit (10000–100000)

❓ Frequently Asked Questions

❓ How do I enable VOS3000 CDR text file export?

📁 To enable the VOS3000 CDR text file export, navigate to Operation management → Softswitch management → Additional settings → Softswitch parameter and set SS_CDR_RECORD_TO_FILE to On. This parameter is Off by default, so it must be explicitly enabled. After saving the configuration, VOS3000 will begin creating hourly CDR text files in the cdr/ directory starting from the next hourly interval. The files follow the naming convention YYYYMMDDHH.txt as documented in the VOS3000 manual §4.4.

❓ What is the difference between SS_CDR_RECORD_TO_FILE and SS_CDR_RECORD_NONCONNECT?

🔧 SS_CDR_RECORD_TO_FILE is the master switch that enables CDR text file export entirely. Without it set to On, no CDR text files are created at all. SS_CDR_RECORD_NONCONNECT only takes effect when SS_CDR_RECORD_TO_FILE is already On — it controls whether zero-duration call records (failed calls, busy signals, no-answer attempts) are included in the exported text files. When SS_CDR_RECORD_NONCONNECT is Off, only connected calls with non-zero hold time appear in the export.

❓ Where are VOS3000 CDR text files stored?

📂 VOS3000 CDR text files are stored in the cdr/ directory under the VOS3000 installation path. Each file is named using the format YYYYMMDDHH.txt, where each file contains all CDRs for calls that ended during that specific hour. For example, the file 2026042612.txt contains all CDRs for calls that ended between 12:00:00 and 12:59:59 on April 26, 2026. This file structure is documented in the official VOS3000 manual §4.4 (page 241).

❓ Can I export historical CDR data that was generated before enabling text file export?

📋 No, the VOS3000 CDR text file export only generates files for new calls after the feature is enabled. Historical CDR data that was generated while SS_CDR_RECORD_TO_FILE was Off is only available through the VOS3000 client CDR query interface or by querying the MySQL database directly. If you need to export historical data, use the CDR query function in the client and export the results manually. This is why it is strongly recommended to enable SS_CDR_RECORD_TO_FILE from the very first day of deployment.

❓ How much disk space do VOS3000 CDR text files consume?

💾 Disk space consumption depends entirely on your call volume. Each CDR record is approximately 200–350 bytes in the pipe-delimited text format. A system processing 100,000 calls per day would generate roughly 25–35 MB of CDR text data per day, or about 1 GB per month. With the default SERVER_CDR_FILE_WRITE_MAX of 2048 files (roughly 85 days of retention), a mid-traffic system would need approximately 3–4 GB of dedicated disk space for CDR files. Always monitor disk usage and configure VOS3000 disk alarms to receive alerts before space runs out.

❓ What is the pipe delimiter character used in VOS3000 CDR text files?

🔗 The VOS3000 CDR text file format uses the vertical bar or pipe character (|, ASCII 124) as the field delimiter. Each line in the file represents one call detail record, with fields separated by pipe characters. This format is widely supported by data processing tools, programming languages (Python, PHP, Perl), database import utilities (MySQL LOAD DATA INFILE), and spreadsheet applications. When parsing, always split on the pipe character and validate the expected field count.

📞 Need Expert Help with VOS3000 CDR Text File Export?

🔧 Proper VOS3000 CDR text file export configuration ensures your billing data is complete, your audit trail is intact, and your external systems receive the call data they need. Whether you are setting up CDR export for the first time, troubleshooting missing records, or integrating CDR data with an external billing platform, expert guidance saves time and prevents costly data gaps. 📊

💬 WhatsApp: +8801911119966 — Get immediate assistance with VOS3000 CDR text file export setup, parsing, and integration. Our team specializes in VOS3000 softswitch configuration, billing system integration, and custom CDR analytics solutions. 🔧

🔗 Learn more about related VOS3000 CDR and billing configurations:

VOS3000 CDR Analysis and Billing — Complete guide to analyzing CDR data for revenue optimization
VOS3000 Billing System — Overview of the entire VOS3000 billing architecture
VOS3000 Zero Duration CDR — Managing zero-duration call records during DDoS and flood attacks
Illegal Call Detection in VOS3000 — How SS_CDR_RECORD_ILLEGAL captures unauthorized call attempts
VOS3000 CDR Billing Discrepancy — Troubleshooting billing differences between CDR and rate tables
VOS3000 Data Report — Using VOS3000 reporting tools for traffic and revenue analysis

📞 Need Professional VOS3000 Setup Support?

For professional VOS3000 installations and deployment, VOS3000 Server Rental Solution:

📱 WhatsApp: +8801911119966
🌐 Website: www.vos3000.com
🌐 Blog: multahost.com/blog
📥 Downloads: VOS3000 Downloads

VOS3000 CDR File Rotation Robust Backup Write Interval Best Configuration

April 26, 2026April 26, 2026 king

VOS3000 CDR File Rotation Robust Backup Write Interval Configuration

📋 Every VoIP operator knows that CDR data is the lifeblood of billing reconciliation — lose your call records, and you lose revenue. The VOS3000 CDR file rotation system, controlled by SERVER_CDR_FILE_WRITE_INTERVAL and SERVER_CDR_FILE_WRITE_MAX, provides a robust backup mechanism that writes call records to text files independently of the primary database. When configured correctly, this ensures you always have a secondary copy of every CDR — even during database outages, server restarts, or unexpected failures. 🛡️

⚠️ But misconfigure the rotation parameters, and you risk two catastrophic outcomes: disk overflow from uncontrolled CDR file accumulation, or missing records if the rotation window is too long during peak traffic. The VOS3000 CDR file rotation parameters give you precise control over how frequently backup files are generated and how many are retained — balancing data integrity against disk consumption. This guide covers every detail from the official VOS3000 2.1.9.07 manual, with no fabricated values. 🔧

🎯 Need help configuring your VOS3000 CDR backup? Contact our team at WhatsApp: +8801911119966 for expert assistance with CDR rotation, billing setup, and complete VOS3000 deployment. 💬

🔐 What Is VOS3000 CDR File Rotation?

📊 The VOS3000 CDR file rotation system is an additional backup mechanism that writes call detail records to plain text files on the server filesystem. This operates alongside the primary CDR database, providing redundancy and enabling external analytics integration. The system generates pipe-delimited text files in the cdr directory beneath the VOS3000 installation directory, with one file created per configured time interval. 📁

💡 Why this matters: The backup CDR file system serves several critical purposes:

🛡️ Disaster recovery: If the database becomes corrupted or unavailable, text files remain intact on disk
📊 External analytics: Pipe-delimited files are easy to parse with Python, awk, or business intelligence tools
🔄 Regulatory compliance: Many telecom regulators require CDR archival in flat-file format
💰 Billing reconciliation: Compare database CDRs against file CDRs to detect discrepancies
📡 Real-time monitoring: Some operators tail the CDR files for live traffic visibility

🔑 Key distinction: The VOS3000 CDR file rotation is a backup mechanism. It does not replace the database CDR storage. The primary CDR records are always written to the database first; the file-based system creates a secondary copy that can be used independently.

⚙️ SERVER_CDR_FILE_WRITE_INTERVAL — The Core Parameter

⏱️ SERVER_CDR_FILE_WRITE_INTERVAL defines the time interval (in seconds) at which the softswitch creates new CDR text files. Each time this interval elapses, a new file is opened and the previous file is finalized for reading. 📋

Attribute	Value
📌 Parameter Name	SERVER_CDR_FILE_WRITE_INTERVAL
🔢 Default Value	None (not set by default)
📐 Unit	Seconds
📏 Range	60–86400
📝 Description	Additional write call record file, the new file created time interval (seconds)
📍 Location	Operation management → Softswitch management → Additional settings → Server parameter

💡 How the interval works: When you set SERVER_CDR_FILE_WRITE_INTERVAL to a value such as 3600 (1 hour), the softswitch creates a new CDR text file every hour. All CDRs whose end time falls within that hour are written to the corresponding file. At the end of the interval, the file is closed and a new one is opened. The file naming convention follows the format YYYYMMDDHH.txt — for example, 2026042612.txt contains all CDRs that ended between 12:00 and 13:00 on April 26, 2026.

🎯 Interval Value Recommendations by Traffic Volume

📡 The optimal interval depends heavily on your call volume. Higher traffic demands shorter intervals to prevent individual files from becoming too large: 💡

Traffic Volume	Recommended Interval	Seconds Value	Rationale
📞 Low (<50 CPS)	1 hour	3600	✅ Manageable file size; hourly granularity
📊 Medium (50–200 CPS)	30 minutes	1800	🔧 Prevents oversized files during peaks
🔥 High (200+ CPS)	15 minutes	900	🛡️ Keeps files manageable; easier parsing
⚠️ Extreme (DDoS scenario)	5 minutes	300	🚨 Rapid rotation prevents disk fill

⚠️ Important: The minimum allowed value is 60 seconds and the maximum is 86400 seconds (24 hours). Setting the interval below 60 seconds is not supported. If your traffic is so high that even 5-minute files are too large, consider increasing SERVER_CDR_FILE_WRITE_MAX to retain more files, or implementing an external script that periodically archives old files to remote storage.

📦 SERVER_CDR_FILE_WRITE_MAX — Rotation File Count Limit

📁 While SERVER_CDR_FILE_WRITE_INTERVAL controls how often new files are created, SERVER_CDR_FILE_WRITE_MAX controls how many backup CDR files are retained on disk. This parameter prevents uncontrolled disk consumption by automatically deleting the oldest files when the count exceeds the limit. 🗑️

Attribute	Value
📌 Parameter Name	SERVER_CDR_FILE_WRITE_MAX
🔢 Default Value	2048
📐 Unit	Number of files
📏 Range	10–4096
📝 Description	Additional write call record file, the maximum number of reserved file
📍 Location	Operation management → Softswitch management → Additional settings → Server parameter

🔄 How rotation works: When the number of CDR text files exceeds SERVER_CDR_FILE_WRITE_MAX, the oldest files are automatically deleted. This creates a sliding window of retained CDR data — at any given time, you have at most the most recent N files on disk, where N equals SERVER_CDR_FILE_WRITE_MAX.

📊 Calculating Retention Period from Rotation Parameters

🧮 The total retention period depends on both the write interval and the maximum file count. Here is the formula: 💡

📋 VOS3000 CDR File Retention Calculation:

Retention Period = SERVER_CDR_FILE_WRITE_INTERVAL × SERVER_CDR_FILE_WRITE_MAX

Example 1 (Default Settings):
  Interval = 3600s (1 hour)  ×  Max Files = 2048
  Retention = 3600 × 2048 = 7,372,800 seconds ≈ 85.3 days

Example 2 (High Traffic):
  Interval = 1800s (30 min)  ×  Max Files = 2048
  Retention = 1800 × 2048 = 3,686,400 seconds ≈ 42.7 days

Example 3 (Maximum Retention):
  Interval = 86400s (24 hours)  ×  Max Files = 4096
  Retention = 86400 × 4096 = 353,894,400 seconds ≈ 11.2 years

Example 4 (Short Retention, Frequent Rotation):
  Interval = 300s (5 min)  ×  Max Files = 2048
  Retention = 300 × 2048 = 614,400 seconds ≈ 7.1 days

⚠️ Critical warning: A shorter interval with the same file count means shorter total retention. If you decrease the interval for performance reasons, you must proportionally increase the file count to maintain the same retention period. Otherwise, you may lose historical CDR backup data faster than expected. 🔥

🖥️ Enabling VOS3000 CDR File Rotation

🔧 The VOS3000 CDR file rotation requires two conditions to be met before it generates backup files: the SS_CDR_RECORD_TO_FILE parameter must be enabled, and the SERVER_CDR_FILE_WRITE_INTERVAL must be set to a valid value. 📋

Step 1: Enable CDR Text File Export 📄

🔐 Log in to VOS3000 Client
📌 Navigate: Operation management → Softswitch management → Additional settings → Softswitch parameter
🔍 Locate SS_CDR_RECORD_TO_FILE
✏️ Set value to On

Attribute	Value
📌 Parameter Name	SS_CDR_RECORD_TO_FILE
🔢 Default Value	Off
📝 Description	Save CDR as TXT — enables the backup CDR text file system
📍 Location	Operation management → Softswitch management → Additional settings → Softswitch parameter

Step 2: Configure Write Interval ⏱️

📌 Navigate: Operation management → Softswitch management → Additional settings → Server parameter
🔍 Locate SERVER_CDR_FILE_WRITE_INTERVAL
✏️ Set the desired interval value (60–86400 seconds) based on your traffic volume

Step 3: Configure Maximum File Count 📁

🔍 In the same Server parameter section, locate SERVER_CDR_FILE_WRITE_MAX
✏️ Set the maximum number of files to retain (10–4096, default: 2048)
💾 Save and apply the configuration

Step 4: Verify CDR File Generation ✅

🖥️ After configuration, verify that files are being generated in the CDR directory:

# Check the CDR directory on the VOS3000 server
ls -la /home/vos3000/cdr/

# Expected output — files named by YYYYMMDDHH convention:
# -rw-r--r-- 1 vos3000 vos3000  245120 Apr 26 12:00 2026042612.txt
# -rw-r--r-- 1 vos3000 vos3000  189340 Apr 26 13:00 2026042613.txt
# -rw-r--r-- 1 vos3000 vos3000  312500 Apr 26 14:00 2026042614.txt

# Verify rotation is working — old files should be auto-deleted
# when count exceeds SERVER_CDR_FILE_WRITE_MAX
ls -1 /home/vos3000/cdr/ | wc -l

📊 For detailed CDR file format information, see our VOS3000 CDR pipe format reference guide.

🔄 VOS3000 CDR File Rotation and Disk Space Management

💾 One of the most critical aspects of VOS3000 CDR file rotation is managing disk space consumption. Each CDR record written to the text file contains 18 pipe-delimited fields. A typical single CDR line is approximately 200–350 bytes depending on the length of phone numbers, IP addresses, and other variable-length fields. 📏

📐 Estimating Disk Space Requirements

📊 Use this calculation to estimate your CDR file storage needs: 💡

Metric	Formula	Example (100 CPS)
CDR lines per hour	CPS × 3600	360,000
File size per hour	Lines × 300 bytes (avg)	~108 MB/hour
Daily disk usage	File/hour × 24	~2.6 GB/day
With 2048 hourly files	2048 × 108 MB	~221 GB total

⚠️ Key insight: At 100 CPS with hourly intervals and the default 2048 file limit, you need approximately 221 GB of disk space for CDR files alone. This does not account for the database, logs, or other system files. Ensure your server has adequate storage, or implement an external archival strategy. For help sizing your VOS3000 server, see our concurrent call load test guide. 🔧

🛡️ Common VOS3000 CDR File Rotation Problems and Solutions

❌ Misconfigured rotation parameters cause a range of issues from missing records to disk overflow. Here are the most common problems and their solutions: 🔍

❌ Problem 1: CDR Files Not Being Generated

🔍 Symptom: The CDR directory exists but no text files are being created, even though calls are flowing through the system.

💡 Cause: The most common reason is that SS_CDR_RECORD_TO_FILE is set to Off (default). Without enabling this parameter, the VOS3000 CDR file rotation system is completely inactive regardless of the interval and max file settings.

✅ Solutions:

🔧 Set SS_CDR_RECORD_TO_FILE to On in Softswitch parameter settings
📊 Verify SERVER_CDR_FILE_WRITE_INTERVAL is set to a valid value between 60 and 86400
📁 Check that the cdr directory exists beneath the VOS3000 installation directory and has write permissions
🔍 Check the softswitch logs for any write errors

❌ Problem 2: Disk Space Exhausting Rapidly

🔍 Symptom: The server runs out of disk space quickly, and the CDR directory contains a very large number of files.

💡 Cause: SERVER_CDR_FILE_WRITE_MAX is set too high, or the write interval is very short, causing many small files that collectively consume large amounts of disk space. Alternatively, the automatic file deletion mechanism may not be working correctly.

✅ Solutions:

📁 Reduce SERVER_CDR_FILE_WRITE_MAX to a value that fits within your available disk space
⏱️ Increase SERVER_CDR_FILE_WRITE_INTERVAL to create fewer, larger files
🔄 Implement an external archival script that moves old CDR files to remote storage (NFS, S3, etc.)
📊 Monitor disk usage with a cron job that alerts you when usage exceeds 80%

❌ Problem 3: Historical CDR Files Disappearing Too Quickly

🔍 Symptom: You need to look up CDR data from 30 days ago, but the oldest available file is only from 10 days ago.

💡 Cause: The retention period (interval × max files) is shorter than your required retention window. This happens when the interval is decreased without proportionally increasing the file count.

✅ Solutions:

📐 Calculate your required retention: Required Max Files = Required Days × 86400 / Interval
📦 Increase SERVER_CDR_FILE_WRITE_MAX to the calculated value (up to 4096 maximum)
🗄️ If you need more than 4096 files, implement external archival before rotation deletes them
📋 For detailed CDR querying guidance, see our VOS3000 CDR analysis and billing guide

❌ Problem 4: Zero-Duration Calls Flooding CDR Files

🔍 Symptom: CDR text files are much larger than expected, filled with records for calls that never connected (0-second duration).

💡 Cause: The SS_CDR_RECORD_NONCONNECT parameter is set to On, causing all non-connected calls (failed attempts, busy, no answer) to be included in the text file export along with successful calls.

✅ Solutions:

⚙️ Set SS_CDR_RECORD_NONCONNECT to Off to exclude zero-duration calls from the file export
📊 Keep it On only if you need failed call data for analytics or fraud detection
🛡️ During DDoS attacks, set SERVER_BILLING_RECORD_ZERO_HOLD_TIME to Off to prevent database overload — see our DDoS protection guide

📋 Complete VOS3000 CDR File Rotation Parameter Reference

📊 Here is the complete reference table for all parameters related to CDR file rotation, sourced from the official VOS3000 2.1.9.07 manual: 🔧

Parameter	Default	Range	Purpose
SERVER_CDR_FILE_WRITE_INTERVAL	None	60–86400s	Time interval for new CDR file creation
SERVER_CDR_FILE_WRITE_MAX	2048	10–4096	Maximum number of CDR files to retain
SS_CDR_RECORD_TO_FILE	Off	On/Off	Enable/disable CDR text file export
SS_CDR_RECORD_NONCONNECT	Off	On/Off	Include non-connected calls (0s) in file export
SS_CDR_RECORD_ILLEGAL	On	On/Off	Record illegal calls in CDR files
SERVER_CDR_REAL_TIME_REPORT_SERVER	None	IP:Port	Forward CDRs to external server in real-time

📍 All server parameters are located at: Navigation → Operation management → Softswitch management → Additional settings → Server parameter. Softswitch parameters are at the same path under Softswitch parameter.

💡 VOS3000 CDR File Rotation Best Practices

🎯 Follow these best practices to ensure your VOS3000 CDR file rotation is both reliable and efficient: 📋

Best Practice	Recommendation	Reason
📊 Calculate retention needs	Interval × Max Files = Retention	✅ Ensures you keep enough historical data
📁 Implement external archival	Cron job to copy old files to remote storage	🛡️ Prevents data loss when rotation deletes files
⏱️ Match interval to traffic	Higher CPS = shorter interval	🔧 Keeps individual file sizes manageable
💾 Monitor disk space	Alert at 80% usage threshold	🚨 Prevents unexpected disk-full outages
🔄 Test recovery regularly	Parse backup files monthly to verify integrity	📋 Confirms files are usable when needed
🔐 Secure CDR directory	Restrict file permissions to vos3000 user only	🛡️ CDRs contain sensitive billing data

💬 Questions about your VOS3000 CDR file rotation setup? Reach out at WhatsApp: +8801911119966 — our VOS3000 experts can help you optimize rotation settings for your traffic volume and retention requirements. 📞

❓ Frequently Asked Questions

❓ What is the default value for SERVER_CDR_FILE_WRITE_INTERVAL?

📋 The default value for SERVER_CDR_FILE_WRITE_INTERVAL is None (not set). This means that CDR file rotation is not active by default. You must explicitly set a value between 60 and 86400 seconds and enable SS_CDR_RECORD_TO_FILE to On before the system generates backup CDR text files. Without this configuration, CDR records are only stored in the database. 💡

❓ How does VOS3000 CDR file rotation prevent disk overflow?

🛡️ The VOS3000 CDR file rotation uses SERVER_CDR_FILE_WRITE_MAX to enforce a maximum number of retained files. When the file count exceeds this limit, the oldest files are automatically deleted. For example, with the default value of 2048 and an hourly interval, the system retains approximately 85 days of CDR files. Once the 2049th file is created, the oldest file is removed, maintaining a consistent disk footprint. This sliding window mechanism ensures the CDR directory never grows beyond a predictable size. 📁

❓ Can I change the VOS3000 CDR file rotation interval without restarting?

🔧 Server parameters in VOS3000 typically take effect after saving and applying the configuration through the VOS3000 Client interface. While some parameters may apply immediately, it is recommended to verify that the new interval is in effect by checking the timestamps of newly created CDR files. If the old interval persists, a softswitch service restart may be required. Always test configuration changes during a maintenance window to avoid any disruption to CDR recording. 📊

❓ What is the relationship between SS_CDR_RECORD_TO_FILE and SERVER_CDR_FILE_WRITE_INTERVAL?

🔗 SS_CDR_RECORD_TO_FILE is the master switch that enables or disables the entire CDR text file system. SERVER_CDR_FILE_WRITE_INTERVAL controls the frequency of file creation within that system. If SS_CDR_RECORD_TO_FILE is Off (default), no CDR files are generated regardless of the interval setting. If it is On but the interval is not set (None), the system may not create files properly. Both parameters must be correctly configured for the VOS3000 CDR file rotation to function. 🎯

❓ How do I include non-connected calls in the CDR text files?

📊 By default, SS_CDR_RECORD_NONCONNECT is set to Off, which means only successfully connected calls (calls with duration greater than 0 seconds) are written to the CDR text files. To include failed call attempts, busy calls, and no-answer calls, set SS_CDR_RECORD_NONCONNECT to On. Be aware that enabling this parameter significantly increases the number of CDR records per file, especially during traffic spikes or attack scenarios. For DDoS protection guidance, see our zero duration CDR control guide. ⚠️

❓ Where are VOS3000 CDR text files stored on the server?

📁 CDR text files are stored in the cdr directory beneath the VOS3000 installation directory. The file naming convention is YYYYMMDDHH.txt, where YYYY is the year, MM is the month, DD is the day, and HH is the hour. Each file contains all CDRs whose end time falls within that time window. For example, 2026042614.txt contains CDRs for calls that ended between 14:00 and 15:00 on April 26, 2026. The files use pipe-delimited format with 18 fields per record — see our CDR pipe format reference for complete field documentation. 📋

📞 Need Expert Help with VOS3000 CDR File Rotation?

🔧 Proper VOS3000 CDR file rotation configuration is essential for ensuring billing data integrity, meeting regulatory retention requirements, and preventing disk overflow disasters. Whether you need to set up CDR backup for the first time, tune rotation parameters for high traffic, or implement an external archival strategy, our VOS3000 experts are here to help. 🛡️

💬 Contact us at WhatsApp: +8801911119966 for professional VOS3000 deployment, CDR configuration, and ongoing support. We help VoIP operators worldwide optimize their softswitch performance and billing accuracy. 🌐

📖 Explore more VOS3000 guides: CDR analysis and billing, billing system overview, and parameter description reference. 🔗

📞 Need Professional VOS3000 Setup Support?

For professional VOS3000 installations and deployment, VOS3000 Server Rental Solution:

📱 WhatsApp: +8801911119966
🌐 Website: www.vos3000.com
🌐 Blog: multahost.com/blog
📥 Downloads: VOS3000 Downloads

VOS3000 SIP Authentication Retry, VOS3000 SIP Early Hangup, VOS3000 SIP Session Timer Refresh, VOS3000 Non-Timer Endpoint Safety, VOS3000 SIP NAT Keepalive, VOS3000 SIP Resend Interval, VOS3000 SIP INVITE Timeout, VOS3000 SIP Call Progress Timeout, VOS3000 SIP Outbound Registration Parameters, VOS3000 SIP Privacy Header, VOS3000 SIP Routing Gateway Contact, VOS3000 SIP Publish Expire, VOS3000 SIP Display From, VOS3000 SIP Send Unregister

VOS3000 SIP NAT Keep Alive: Complete Configuration Best Practices

April 20, 2026April 20, 2026 king

VOS3000 SIP NAT Keep Alive: Complete Configuration Best Practices 📞🔄🛡️

Are your VoIP endpoints losing registration behind NAT firewalls? 📱🔥 One-way audio, dropped calls, and unreachable devices are classic symptoms of NAT binding expiration. The VOS3000 SIP NAT keep alive mechanism solves this by sending periodic UDP heartbeat messages that maintain the NAT pinhole open, ensuring your SIP devices stay reachable at all times. ⚙️📡

In this comprehensive guide, we break down every VOS3000 SIP NAT keep alive parameter — from message content and sending period to interval and quantity per cycle — so you can configure heartbeat settings with precision and eliminate NAT-related registration failures. 🔧✅

What Is VOS3000 SIP NAT Keep Alive? 🌐🔒

Network Address Translation (NAT) creates temporary port mappings (pinholes) for outbound connections. When a SIP device behind NAT registers with VOS3000, the NAT firewall opens a pinhole for the response. However, if no traffic passes through this pinhole for a period exceeding the NAT’s UDP timeout (often 30–120 seconds on consumer routers), the mapping is destroyed. ❌📡

When the pinhole closes:

📞 VOS3000 cannot reach the device for inbound calls
🔇 One-way audio or no audio at all
📋 Registration appears active but the device is unreachable
🔄 Call failures and frustrated users

The VOS3000 SIP NAT keep alive feature addresses this by having the server proactively send UDP heartbeat messages to registered NAT devices at regular intervals, keeping the NAT mapping alive. 💡🛡️ This is especially critical when devices do not support SIP REGISTER retransmission for keeping their NAT bindings open.

As documented in the VOS3000 2.1.9.07 manual, when a device does not support REGISTER keeping, VOS3000 can send UDP messages to keep the NAT channel active. 🔑🖥️

VOS3000 SIP NAT Keep Alive Parameters Overview 📊⚙️

There are four core SIP parameters that control the NAT keep alive behavior in VOS3000. All of these are configured under Navigation > Operation management > Softswitch management > Additional settings > SIP parameter. 🖥️🔧

Parameter 📋	Default Value	Description 📝
SS_SIP_NAT_KEEP_ALIVE_MESSAGE	HELLO	Content of NAT Keep Message
SS_SIP_NAT_KEEP_ALIVE_PERIOD	30	NAT Keep Message’s Period (seconds)
SS_SIP_NAT_KEEP_ALIVE_SEND_INTERVAL	500	NAT Keep Message’s Send Interval (milliseconds)
SS_SIP_NAT_KEEP_ALIVE_SEND_ONE_TIME	3000	NAT Keep Message’s Quantity per Time

SS_SIP_NAT_KEEP_ALIVE_MESSAGE — Heartbeat Content 🔐💬

The SS_SIP_NAT_KEEP_ALIVE_MESSAGE parameter defines the content of the UDP heartbeat message that VOS3000 sends to NAT devices. By default, this is set to HELLO. 📡🔑

How SS_SIP_NAT_KEEP_ALIVE_MESSAGE Works ⚙️

According to the official VOS3000 manual:

✅ If set (e.g., “HELLO”): VOS3000 sends heartbeat messages with the configured content to each registered NAT device
❌ If not set (empty): The server will not send any heartbeat messages, and NAT bindings may expire

This is the master switch for the entire NAT keep alive feature. Without a value configured, none of the other three parameters have any effect. 🔑⚠️

Setting 📋	Behavior 🔄	Use Case 🎯
Empty (not set)	No heartbeat sent 🚫	Devices use REGISTER for keep-alive
HELLO (default)	Sends “HELLO” as UDP payload ✅	Standard NAT traversal for most endpoints
Custom string	Sends custom content 💡	Vendor-specific device requirements

⚠️ Important: The heartbeat message content is sent as a raw UDP payload — it is NOT a SIP message. Some devices may expect a specific string format. Always verify compatibility with your endpoint vendor. 📝🔧

SS_SIP_NAT_KEEP_ALIVE_PERIOD — Heartbeat Cycle ⏱️🔄

The SS_SIP_NAT_KEEP_ALIVE_PERIOD parameter controls how often VOS3000 completes a full cycle of sending heartbeat messages to all registered NAT devices. The default is 30 seconds, with a valid range of 10–86400 seconds. 📊🕐

Understanding the Period Cycle 🔄

Within each period, VOS3000 iterates through all registered NAT devices and sends heartbeat messages. The system uses the SS_SIP_NAT_KEEP_ALIVE_SEND_INTERVAL and SS_SIP_NAT_KEEP_ALIVE_SEND_ONE_TIME parameters to control pacing within the cycle. 🎯⚙️

Critical manual note: When UDP heartbeat messages of all NAT devices cannot be sent within this cycle, the system will resend from the beginning when the cycle arrives — which may cause some devices to miss heartbeat messages. ⚠️📞

Period Value ⏱️	NAT Timeout Coverage 🔒	Server Load 💻	Best For 🎯
10 seconds	Aggressive 🛡️	High ⬆️	Strict NAT firewalls (30s UDP timeout)
30 seconds (default)	Standard ✅	Moderate ➡️	Most deployments, balanced approach
60 seconds	Relaxed 🔓	Low ⬇️	Lenient NAT, fewer endpoints
300 seconds	Minimal 📉	Very Low ⬇️⬇️	Enterprise NAT with long timeouts
86400 seconds (max)	None ❌	Negligible	Effectively disables keep alive (not recommended)

Period Sizing Formula 📐💡

To ensure every device receives a heartbeat within each period, use this calculation:

Required Period (seconds) ≥ (Total NAT Devices × SS_SIP_NAT_KEEP_ALIVE_SEND_ONE_TIME) × (SS_SIP_NAT_KEEP_ALIVE_SEND_INTERVAL / 1000)

Example with 1000 NAT devices:
= 1000 × 3000 × (500 / 1000)
= 1,500,000 seconds → NOT feasible in one cycle!

This means with large deployments, not all devices can be serviced in a single 30-second period.
The system restarts from the beginning when the period elapses,
so some devices at the end of the list may miss heartbeats.
⚠️ Scale your parameters accordingly!

SS_SIP_NAT_KEEP_ALIVE_SEND_INTERVAL — Message Pacing 🕐📡

The SS_SIP_NAT_KEEP_ALIVE_SEND_INTERVAL parameter sets the delay between consecutive heartbeat messages during the sending cycle. The default is 500 milliseconds. ⚙️🔄

Why Send Interval Matters 🔑

VOS3000 must send heartbeats to potentially thousands of NAT devices. Sending them all simultaneously would flood the network and consume excessive CPU. The send interval spaces out transmissions to prevent burst congestion. 📊💡

Interval (ms) ⏱️	Messages/Second 📤	Network Impact 🌐	Use Case 🎯
100 ms	10 msg/sec	Higher burst 📈	Low device count, fast network
500 ms (default)	2 msg/sec	Balanced ✅	Standard deployments
1000 ms	1 msg/sec	Gentle 📉	High device count, constrained bandwidth

SS_SIP_NAT_KEEP_ALIVE_SEND_ONE_TIME — Quantity Per Device 🔢📡

The SS_SIP_NAT_KEEP_ALIVE_SEND_ONE_TIME parameter determines how many heartbeat messages VOS3000 sends to each NAT device per cycle. The default is 3000. 🔄⚙️

Understanding Quantity Per Time 🎯

This parameter works in conjunction with the send interval to control the pacing of messages within a single period cycle. With a default of 3000 messages per device, VOS3000 sends multiple heartbeats to each device within the period to ensure reliability. 📡✅

Parameter 🔧	Default	Unit	Effect on Performance 💻
SS_SIP_NAT_KEEP_ALIVE_SEND_ONE_TIME	3000	Messages	Higher = more redundancy but more bandwidth 🔼
SS_SIP_NAT_KEEP_ALIVE_SEND_INTERVAL	500	Milliseconds	Higher = slower sending rate 🔽
SS_SIP_NAT_KEEP_ALIVE_PERIOD	30	Seconds	Shorter = more frequent cycles 🔁

The NAT keep alive feature does not operate in isolation. Several related system parameters work together to ensure seamless NAT traversal. Understanding these relationships is essential for a well-tuned VOS3000 SIP NAT keep alive deployment. 🔧📋

Parameter 📋	Default	Purpose 🎯	Relationship to Keep Alive 🔄
SS_ENDPOINT_EXPIRE	300 / 3600	Terminal registration expiry time	Keep alive period should be shorter than expiry 🔑
SS_ENDPOINT_NAT_EXPIRE	300	NAT terminal registration expiry time	Critical: Keep alive must beat this timer 🚨
SS_MEDIA_PROXY_BEHIND_NAT	On	Forward RTP for NAT terminals	Complements keep alive for audio path 📞

The SS_ENDPOINT_NAT_EXPIRE parameter (default 300 seconds) is particularly important. Your VOS3000 SIP NAT keep alive period (default 30 seconds) must always be shorter than the NAT expiry time, ensuring the NAT binding is refreshed well before the registration times out. ⏱️✅ If the keep alive period exceeds the NAT expiry, devices will be deregistered before the next heartbeat arrives. ❌🔥

For more details on registration handling, see our guide on VOS3000 SIP Registration. 📋📞

VOS3000 SIP NAT Keep Alive Configuration Walkthrough 🖥️🔧

Configuring NAT keep alive in VOS3000 is straightforward. Follow these steps to access and set the parameters: 📝✅

Step-by-Step Configuration 📋

🖥️ Open the VOS3000 Client application
📂 Navigate to Operation management > Softswitch management
⚙️ Click on Additional settings
📋 Select the SIP parameter tab
🔍 Find and configure the following parameters:

# NAT Keep Alive Configuration in VOS3000 Client
# Location: Operation management > Softswitch management > Additional settings > SIP parameter

SS_SIP_NAT_KEEP_ALIVE_MESSAGE = HELLO
SS_SIP_NAT_KEEP_ALIVE_PERIOD = 30
SS_SIP_NAT_KEEP_ALIVE_SEND_INTERVAL = 500
SS_SIP_NAT_KEEP_ALIVE_SEND_ONE_TIME = 3000

# Related parameters to verify:
SS_ENDPOINT_NAT_EXPIRE = 300
SS_MEDIA_PROXY_BEHIND_NAT = On

✅ Best Practice: After modifying any SIP parameter, apply the changes and monitor the system for at least 15 minutes. Use the SIP debug guide to verify heartbeat messages are being sent and received correctly. 🔧📡

VOS3000 SIP NAT Keep Alive: Recommended Configurations by Scenario 🎯📊

Different deployment scenarios call for different parameter tuning. Here are recommended configurations based on common use cases: 💡🔧

Scenario 🏠	MESSAGE 💬	PERIOD ⏱️	INTERVAL (ms)	QUANTITY 🔢
Small office (<50 devices)	HELLO	20	500	3000
Medium deployment (50–500)	HELLO	30	500	3000
Large deployment (500+)	HELLO	30	500	1500
Strict NAT / Carrier-grade	HELLO	15	200	3000
Constrained bandwidth	HELLO	30	1000	1000

NAT Keep Alive Message Flow Diagram 🔄📡

The following text diagram illustrates how the VOS3000 SIP NAT keep alive mechanism operates within a single period cycle: 📊🔑

┌─────────────────────────────────────────────────────────────────────┐
│                  VOS3000 NAT Keep Alive Flow                       │
├─────────────────────────────────────────────────────────────────────┤
│                                                                     │
│  Period Cycle (30 seconds default)                                  │
│  ═════════════════════════════════                                  │
│                                                                     │
│  ┌──────────┐    REGISTER     ┌──────────────┐                     │
│  │  SIP Phone│ ──────────────►│   VOS3000    │                     │
│  │ (Behind   │                │   Softswitch  │                     │
│  │  NAT)    │◄────────────── │              │                     │
│  └──────────┘    200 OK       └──────┬───────┘                     │
│       │                              │                              │
│       │     NAT Firewall             │                              │
│       │   ┌────────────┐            │                              │
│       │   │  Pinhole    │            │                              │
│       │   │  Created ✅ │            │                              │
│       │   └─────┬──────┘            │                              │
│       │         │                    │                              │
│       │  ┌──────▼──────┐            │                              │
│       │  │ UDP Timeout  │            │                              │
│       │  │ Approaching  │◄─── ──────│  HELLO (heartbeat)           │
│       │  │ ⏱️ 30s       │            │  at SS_SIP_NAT_KEEP_ALIVE_   │
│       │  └──────┬──────┘            │  PERIOD intervals             │
│       │         │                    │                              │
│       │  ┌──────▼──────┐            │                              │
│       │  │ Pinhole      │◄───────── │  HELLO → Pinhole Refreshed ✅ │
│       │  │ Refreshed ✅ │            │                              │
│       │  └─────────────┘            │                              │
│       │                              │                              │
│       │  If NO keep alive:           │                              │
│       │  ┌──────────────┐            │                              │
│       │  │ Pinhole       │            │                              │
│       │  │ EXPIRED ❌    │            │                              │
│       │  └──────────────┘            │                              │
│       │         │                    │                              │
│       │    ┌────▼────┐               │                              │
│       │    │ INBOUND  │──── X ──────►│  Call FAILS - Unreachable! ❌│
│       │    │ CALL     │               │                              │
│       │    └─────────┘               │                              │
│                                                                     │
└─────────────────────────────────────────────────────────────────────┘

Troubleshooting VOS3000 SIP NAT Keep Alive Issues 🔧⚠️

Even with proper configuration, NAT keep alive issues can arise. Here are common problems and their solutions: 🔍📞

Common Problems and Solutions 🛠️

Problem ❌	Likely Cause 🔍	Solution ✅
Devices unregister randomly	Keep alive period too long for NAT timeout	Reduce SS_SIP_NAT_KEEP_ALIVE_PERIOD to 15–20 seconds 🔽
One-way audio on calls	NAT pinhole expired for media, SS_MEDIA_PROXY_BEHIND_NAT off	Enable media proxy; verify keep alive is active 📞
High CPU on VOS3000 server	SEND_ONE_TIME too high with many devices	Reduce SEND_ONE_TIME or increase SEND_INTERVAL 📉
Some devices never receive heartbeats	Period cycle too short for all devices	Increase PERIOD or reduce SEND_ONE_TIME per device ⏱️
No heartbeats sent at all	SS_SIP_NAT_KEEP_ALIVE_MESSAGE is empty	Set MESSAGE to “HELLO” or a custom string ✅

For deeper troubleshooting of SIP-related issues, refer to our comprehensive VOS3000 troubleshooting guide. 🔧📋 Also check our guide on SIP ALG problems and VoIP NAT troubleshooting for firewall-related issues. 🔥🛡️

VOS3000 SIP NAT Keep Alive vs Device REGISTER 🔄📞

Understanding the relationship between NAT keep alive and SIP REGISTER is critical. The VOS3000 manual clearly explains when each mechanism is appropriate: 📋💡

In normal device registration, the registration is maintained by the device’s own REGISTER refresh messages. These REGISTER messages also keep the NAT pinhole open naturally. However, when a device does not support REGISTER keeping, VOS3000 must step in with server-side UDP heartbeat messages. 🔑🖥️

Aspect 📋	Device REGISTER 📱	Server NAT Keep Alive 🖥️
Initiated by	Endpoint device 🔵	VOS3000 server 🟢
Message type	SIP REGISTER	UDP payload (e.g., “HELLO”)
NAT pinhole refresh	Yes ✅ (outbound from device)	Yes ✅ (inbound from server to NAT pinhole)
Registration refresh	Yes ✅	No ❌ (only keeps NAT pinhole)
When to use	Devices with REGISTER support	Devices without REGISTER keep-alive

Learn more about SIP authentication mechanisms in our VOS3000 SIP authentication guide. 🔐📞

Best Practices for VOS3000 SIP NAT Keep Alive 🏆✅

Follow these proven best practices to get the most from your VOS3000 SIP NAT keep alive configuration: 💡🔧

🔑 Always set MESSAGE — An empty MESSAGE field disables the entire feature. Use “HELLO” unless your device requires a specific string
⏱️ Keep PERIOD shorter than NAT timeout — Most consumer NAT firewalls have a 30–60 second UDP timeout. Set your period to 15–30 seconds
📐 Size for your deployment — With many devices, reduce SEND_ONE_TIME or increase SEND_INTERVAL to prevent CPU overload
🛡️ Enable media proxy — Keep SS_MEDIA_PROXY_BEHIND_NAT = On to ensure RTP media streams traverse NAT correctly
📊 Monitor endpoint expiry — Ensure SS_SIP_NAT_KEEP_ALIVE_PERIOD is well under SS_ENDPOINT_NAT_EXPIRE (default 300 seconds)
📋 Test with SIP debug — Use the SIP debug tools to verify heartbeat delivery
🔒 Check firewall rules — Ensure VOS3000 firewall permits outbound UDP heartbeats to registered device IPs

Need help configuring VOS3000 for your specific NAT scenario? Contact us on WhatsApp at +8801911119966 📱💬 — our team can help you optimize your VOS3000 SIP NAT keep alive settings for any deployment size. 🛡️📞

FAQ: VOS3000 SIP NAT Keep Alive ❓📞

What happens if I leave SS_SIP_NAT_KEEP_ALIVE_MESSAGE empty? 📋

If the SS_SIP_NAT_KEEP_ALIVE_MESSAGE parameter is not set (empty), VOS3000 will not send any heartbeat messages to NAT devices. This means NAT pinholes may expire, causing devices to become unreachable for inbound calls. ❌🔥 Always set this to “HELLO” or a custom string to enable the feature. ✅

What is the best SS_SIP_NAT_KEEP_ALIVE_PERIOD value for strict NAT? ⏱️

For strict NAT firewalls with short UDP timeouts (30 seconds or less), set SS_SIP_NAT_KEEP_ALIVE_PERIOD to 15 seconds. This ensures the heartbeat arrives well before the NAT pinhole expires. 🛡️🔑 For standard deployments, the default 30 seconds works well. ✅

Can VOS3000 NAT keep alive replace SIP REGISTER? 🔄

No. The NAT keep alive mechanism only keeps the NAT pinhole (UDP port mapping) open. It does not refresh the SIP registration itself. Devices that support REGISTER should continue using it for registration renewal. NAT keep alive is specifically for devices that do not support REGISTER-based keep-alive. 📞📋

How do I know if my VOS3000 SIP NAT keep alive is working? 🔍

Use the VOS3000 SIP debug tools or Wireshark to capture UDP traffic from the VOS3000 server to your registered NAT devices. You should see “HELLO” (or your configured message) being sent at the configured period interval. 📡📊 Also check that devices remain registered without unexpected deregistration events. ✅

Why are some devices missing heartbeat messages? ⚠️

When there are too many NAT devices for VOS3000 to service within a single period cycle, some devices at the end of the iteration may not receive a heartbeat. The system restarts from the beginning when the cycle arrives. To fix this, increase SS_SIP_NAT_KEEP_ALIVE_PERIOD or reduce SS_SIP_NAT_KEEP_ALIVE_SEND_ONE_TIME. 🔧📈

Should I change SS_SIP_NAT_KEEP_ALIVE_SEND_INTERVAL from the default? 🕐

In most deployments, the default 500 ms interval is well-balanced. Increase to 1000 ms if you have bandwidth constraints or a very large number of devices. Decrease to 200 ms only for small deployments with strict timing requirements. ⚙️💡 Always monitor server CPU after making changes. 📊

What is the relationship between SS_ENDPOINT_NAT_EXPIRE and keep alive period? 🔗

SS_ENDPOINT_NAT_EXPIRE (default 300 seconds) defines how long a NAT device’s registration remains valid. The keep alive period (default 30 seconds) must always be significantly shorter than this value. A good rule of thumb: keep alive period should be at most 1/5 of the NAT expire time. ⏱️✅ If keep alive period exceeds NAT expire, devices will be deregistered before the next heartbeat cycle. ❌🔥

📞 VOS3000 SIP Registration — Understanding device registration mechanics
🔐 VOS3000 SIP Authentication — 401/407 challenge configuration
🔄 VOS3000 SIP Session — Session timer and call management
📋 VOS3000 SIP Debug Guide — Troubleshooting SIP signaling issues
📊 VOS3000 Parameter Description — Complete parameter reference
🔧 VOS3000 System Parameters — Core system configuration
🛡️ VOS3000 Security — Security hardening for your softswitch
🔥 SIP ALG Problems and VoIP NAT Troubleshooting — NAT firewall issues deep dive
📞 VOS3000 Media Proxy — RTP media traversal for NAT
🔐 VOS3000 Authentication Suspend — Managing authentication suspension
🔧 VOS3000 Troubleshooting Guide 2026 — Comprehensive troubleshooting reference
🌐 VOS3000 Official Downloads — Get the latest VOS3000 software

Need expert assistance with your VOS3000 deployment? 📞💬 Reach out on WhatsApp at +8801911119966 — we provide professional VOS3000 configuration, NAT troubleshooting, and VoIP optimization services worldwide. 🌍🛡️⚙️

📞 Need Professional VOS3000 Setup Support?

For professional VOS3000 installations and deployment, VOS3000 Server Rental Solution:

📱 WhatsApp: +8801911119966
🌐 Website: www.vos3000.com
🌐 Blog: multahost.com/blog
📥 Downloads: VOS3000 Downloads

VOS3000 parameter description, VOS3000 system parameter, VOS3000 data maintenance, VOS3000 data report, VOS3000 number management

VOS3000 Parameter Description: Complete Configuration Reference Guide Free

April 8, 2026April 8, 2026 king

VOS3000 Parameter Description: Complete Configuration Reference Guide

VOS3000 parameter description is the most comprehensive technical reference available for VoIP system administrators who need to configure and optimize their softswitch installations. This complete configuration reference guide covers every single parameter available in VOS3000 version 2.1.9.07, organized into logical categories for easy navigation and practical implementation. Whether you are managing a small wholesale VoIP operation or a large-scale telecom infrastructure, understanding these parameters is essential for achieving optimal call quality, billing accuracy, and system reliability. Based on the official VOS3000 2.1.9.07 manual (Section 4.3.5, Pages 222-252), this guide provides detailed explanations of each parameter including default values, valid ranges, and practical usage scenarios.

📞 Need help with VOS3000 parameter configuration? WhatsApp: +8801911119966

🔍 What is VOS3000 Parameter Description

Reference: VOS3000 2.1.9.07 Manual, Section 4.3.5 (Pages 222-252)

The VOS3000 parameter description framework organizes all configuration settings into a hierarchical structure that reflects the functional architecture of the softswitch system. At the highest level, parameters are divided into three primary categories: VOS3000 server parameters, softswitch parameters (including H323, SIP, and system subcategories), and audio service parameters. Each category controls specific aspects of system behavior, and understanding these categories is crucial for effective system administration. The VOS3000 softswitch platform contains over 200 configurable parameters that control every aspect of system behavior, from billing precision and alarm thresholds to SIP timer values and media proxy settings.

📊 VOS3000 Parameter Description Categories

📁 Category	📋 Description	📖 Manual Pages
VOS3000 Parameters	Server-level parameters for billing, alarms, reports, security	222-228
Softswitch H323 Parameters	H.323 protocol settings for gateway communications	229-230
Softswitch SIP Parameters	SIP protocol settings including NAT, timers, authentication	230-237
Softswitch System Parameters	Core softswitch settings for media, calls, endpoints	237-239
Audio Service Parameters	IVR, voicemail, callback service settings	239-241

⚙️ How to Access VOS3000 Parameter Description Settings

Accessing the VOS3000 parameter description settings requires navigating through the VOS3000 client interface to the appropriate configuration menus. For server parameters, administrators should navigate to System Management, then select System Parameter to view and modify the parameter list. For softswitch parameters including H323, SIP, and system subcategories, the path is Operation Management followed by Softswitch Management, then Additional Settings, and finally System Parameter. Audio service parameters are accessed through the audio service configuration interface.

📍 Navigation Paths for Parameter Access

Step	Navigation Path	Action
1	System Management	Expand navigation tree
2	System Parameter	Double-click to open parameter table
3	Operation Management > Softswitch Management	Select softswitch node
4	Additional Settings	Right-click → Additional settings
5	System Parameter Tab	Find and modify parameters
6	Apply Changes	Click OK to save modifications

📋 VOS3000 Server Parameters Complete List

Reference: VOS3000 2.1.9.07 Manual, Section 4.3.5.1 (Pages 222-228)

The VOS3000 parameter description for server parameters encompasses all configuration settings that control the core server functionality of the softswitch platform. These parameters determine how the server handles billing calculations, generates reports, manages alarms, interacts with databases, and enforces security policies. Server parameters are prefixed with “SERVER_” in the parameter name, making them easily identifiable in the configuration interface.

🔔 Alarm Configuration Parameters in VOS3000

Alarm configuration parameters within the VOS3000 parameter description control how the system monitors and reports various operational conditions. These parameters define thresholds for generating alerts, specify notification methods, and configure alarm suppression settings. Proper configuration of alarm parameters ensures that administrators receive timely notifications of critical system conditions without being overwhelmed by excessive alerts.

⚙️ Parameter Name	📊 Default	📝 Description	📖 Page
SERVER_ALARM_CUSTOMER_BALANCE_MAX_SIZE	1000	Number of accounts in Balance Alarm settings menu	223
SERVER_ALARM_DATABASE_IGNORE_ERROR_CODE	–	Database error codes to ignore without triggering warnings	223
SERVER_ALARM_DISABLE	Off	Off enables alarm system, On disables all alarms	223
SERVER_ALARM_E164S	Default	Default E164 number for Alarm Management	223
SERVER_ALARM_EMAIL	Default	Default email address for alarm notifications	223
SERVER_ALARM_EMAIL_DELAY	300	Interval in seconds between email alarm notifications	223
SERVER_ALARM_ENABLE_EMAIL	Off	Enable email alarm notifications (On/Off)	223
SERVER_ALARM_ENABLE_VOICE	Off	Enable voice call alarm notifications (On/Off)	223

💰 Billing System Parameters in VOS3000 Parameter Description

The billing system parameters form a critical component of the VOS3000 parameter description because they directly affect revenue calculation and financial accuracy. These parameters control billing precision, fee calculation methods, free call duration settings, and various billing behaviors that determine how calls are charged. Misconfiguration of billing parameters can result in revenue loss, customer disputes, or billing errors.

⚙️ Parameter Name	📊 Default	📝 Description	📖 Page
SERVER_BILLING_FEE_PRECISION	0.0000000	Billing money accuracy precision (0-1000 decimal places)	224
SERVER_BILLING_FEE_UNIT	0.0000000	Billing money unit for charge calculations (0-1000)	224
SERVER_BILLING_FORWARD_PREFIX	–	Billing prefix for Call Transfer scenarios	224
SERVER_BILLING_FREE_E164S	–	Service numbers for free calls with no time limit	224
SERVER_BILLING_FREE_TIME	0	Free duration in seconds to deduct from charged time	224
SERVER_BILLING_GATEWAY_ROUTE_PREFIX	–	Routing gateway additional prefix for billing	224
SERVER_BILLING_HOLD_TIME_PRECISION	1000	Time precision in milliseconds for billing duration	224
SERVER_BILLING_NO_CDR_E164S	–	Numbers that will not create CDR records	224
SERVER_BILLING_PREVENT_OVERDRAFT_ADVANCE_TIME	1	Account anti-overdraft advance minutes (1-15)	224
SERVER_BILLING_PROFIT_CALCULATE	Call charges – Sub – Call expense	Formula for call profit calculation	224

📊 CDR and Reporting Parameters

Call Detail Record (CDR) and reporting parameters within the VOS3000 parameter description govern how call records are generated, stored, and processed for reporting purposes. These parameters determine CDR file formats, storage intervals, queue sizes, and automatic report generation settings. Proper configuration of CDR parameters is essential for maintaining accurate call records and enabling detailed traffic analysis.

⚙️ Parameter Name	📊 Default	📝 Description	📖 Page
SERVER_CDR_FILE_WRITE_INTERVAL	None	Interval in seconds for creating new CDR files (60-86400)	225
SERVER_CDR_FILE_WRITE_MAX	2048	Maximum number of CDR files to retain (10-4096)	225
SERVER_CDR_REAL_TIME_REPORT_SERVER	–	Address for real-time CDR reporting server	225
SERVER_MAX_CDR_PENDING_LIST_LENGTH	100000	Maximum length of CDR processing queue (10000-100000)	225
SERVER_QUERY_CDR_DENY_TIME	–	Hours when CDR query is denied (e.g., 18,19,20,21)	225
SERVER_QUERY_CDR_MAX_DAY_INTERVAL	31	Maximum days for CDR query interval	225

📈 Automatic Report Generation Parameters

The VOS3000 parameter description includes numerous parameters that control automatic report generation for business intelligence and operational analysis purposes. These reports are generated daily at approximately 1:00 AM and include revenue reports, gateway billing analysis, clearing reports, and various analytical reports.

⚙️ Parameter Name	📊 Default	📝 Report Generated
SERVER_REPORT_AGENT_INCOME	On	Agent Income Report
SERVER_REPORT_CLEARING_CUSTOMER_FEE	Off	Clearing Account Details Report
SERVER_REPORT_CUSTOMER_FEE	On	Revenue Details Report
SERVER_REPORT_GATEWAY_FEE	On	Gateway Bill Report
SERVER_REPORT_PHONE_FEE	On	Phone Bill Report
SERVER_REPORT_GATEWAY_ROUTING_LOCATION_ASR_ACD	On	Routing Gateway Area Analysis Report

🔒 Security and Authentication Parameters

Security parameters in the VOS3000 parameter description establish the foundational security posture of the softswitch system. These parameters control password policies, login attempt restrictions, session management, and various authentication behaviors that protect the system from unauthorized access. In today’s threat landscape where VoIP systems are frequent targets for fraud and abuse, proper configuration of security parameters is essential.

⚙️ Parameter Name	📊 Default	📝 Description	📖 Page
SERVER_LOGIN_FAILED_DISABLE_TIME	120	Seconds to disable login after failed attempts (30-7200)	226
SERVER_PASSWORD_LENGTH	8	Default minimum password length requirement	226
SERVER_PASSWORD_TERMINAL_ADDITIONAL_CHARACTERS	–	Additional characters for phone/gateway random passwords	226
SERVER_VERIFY_CLEARING_CUSTOMER	Off	Verify clearing account balance against minimum limit	226
SERVER_VERIFY_CLEARING_CUSTOMER_REMAIN_MONEY_LIMIT	0.0	Clearing account minimum balance limit (0-10000000)	226

🖥️ System Configuration Parameters

System configuration parameters in the VOS3000 parameter description control various operational aspects of the server including NTP time synchronization, display settings, database version management, and network configuration. These parameters establish the operational environment in which the softswitch functions.

⚙️ Parameter Name	📊 Default	📝 Description	📖 Page
SERVER_NTP_SERVER	time-a.nist.gov	Network time server (SNTP) for system time sync	227
SERVER_DATABASE_VERSION	–	Current database version identifier	227
SERVER_DISPLAY_MONEY_PRECISION	3	Money display precision (e.g., 3 shows 1.000)	227
SERVER_DNS_UPDATE_INTERVAL	600	DNS update interval in seconds for Domain Management	227
SERVER_SOFTSWITCH_CLUSTER	–	IP list of softswitch cluster nodes	227
SERVER_QUERY_MAX_SIZE	30000000	Maximum data query limit in items	227
SERVER_QUERY_ONE_PAGE_SIZE	10000	Number of data items per query page	227
SERVER_TRACE_FILE_LENGTH	40960	Debug file size in KB	227

📡 Softswitch H323 Parameters in VOS3000 Parameter Description

Reference: VOS3000 2.1.9.07 Manual, Section 4.3.5.2 (Pages 229-230)

The H323 parameters within the VOS3000 parameter description control the behavior of H.323 protocol signaling for gateway communications. H.323 is an ITU-T standard protocol suite for multimedia communications over packet-based networks, and it remains widely deployed in enterprise and carrier VoIP environments despite the growing adoption of SIP.

⚙️ Parameter Name	📊 Default	📝 Description	📖 Page
SS_H245_PORT_RANGE	10000,39999	H245 port range for media control channels	229
SS_H323_DTMF_METHOD	H.245 alphanumeric	Default DTMF transmission mode for H.323	229
SS_H323_NUMBERING_PLAN	UnknownPlan(0)	Default numbering plan in Routing Gateway H323	229
SS_H323_NUMBER_TYPE	UnknownType(0)	Default number type in Routing Gateway H323	229
SS_H323_TIMEOUT_ALERTING	120	Alerting timeout in seconds for Routing Gateway H323	230
SS_H323_TIMEOUT_SETUP	5	Setup timeout in seconds for H.323 call establishment	230

📞 Softswitch SIP Parameters Complete Reference

Reference: VOS3000 2.1.9.07 Manual, Section 4.3.5.2 (Pages 230-237)

The SIP parameters represent one of the most extensive sections within the VOS3000 parameter description, reflecting the complexity and flexibility of the Session Initiation Protocol. SIP has become the dominant signaling protocol for VoIP communications, and VOS3000 provides comprehensive configuration options for controlling every aspect of SIP behavior including authentication, NAT traversal, session timers, and timeout values.

🔑 SIP Authentication Parameters

⚙️ Parameter Name	📊 Default	📝 Description	📖 Page
SS_SIP_AUTHENTICATION_CODE	–	SIP authentication code for gateway registration	230
SS_SIP_AUTHENTICATION_REALM	–	SIP authentication realm for digest authentication	230

📡 NAT Keep-Alive Parameters

NAT keep-alive parameters in the VOS3000 parameter description are critical for maintaining connectivity with endpoints behind NAT devices. These parameters control the message content, sending period, and batching behavior for UDP heartbeat messages that prevent NAT bindings from expiring.

⚙️ Parameter Name	📊 Default	📏 Range	📝 Description
SS_SIP_NAT_KEEP_ALIVE_MESSAGE	HELLO	Text string	Content of NAT keep-alive UDP packet (empty = disabled)
SS_SIP_NAT_KEEP_ALIVE_PERIOD	30	10-86400 sec	Interval between keep-alive transmissions
SS_SIP_NAT_KEEP_ALIVE_SEND_INTERVAL	500	1-10000 ms	Delay between individual keep-alive packets in batch
SS_SIP_NAT_KEEP_ALIVE_SEND_ONE_TIME	3000	1-10000	Number of keep-alive packets sent per batch cycle

⏱️ SIP Session Timer Parameters

Session timer parameters in the VOS3000 parameter description control the SIP session timer functionality that prevents “zombie calls” from persisting in the system. Based on RFC 4028, the session timer mechanism ensures that failed or hung calls are detected and cleaned up automatically.

⚙️ Parameter Name	📊 Default	📏 Range	📝 Description
SS_SIP_SESSION_TTL	600	60-86400 sec	Detecting SIP connected status interval (Session-Expires)
SS_SIP_SESSION_UPDATE_SEGMENT	2	2-10	Divisor for refresh interval calculation (TTL/segment)
SS_SIP_SESSION_MIN_SE	90	90-3600 sec	Minimum session expires value per RFC 4028
SS_SIP_NO_TIMER_REINVITE_INTERVAL	7200	0-86400 sec	Maximum call duration for non-timer endpoints

🎛️ Softswitch System Parameters in VOS3000 Parameter Description

Reference: VOS3000 2.1.9.07 Manual, Section 4.3.5.2 (Pages 237-239)

Softswitch system parameters control core softswitch functionality including media handling, call processing, gateway management, and blacklist/whitelist behavior. These parameters affect how the softswitch processes calls and interacts with gateways and endpoints.

🎬 Media and Call Processing Parameters

⚙️ Parameter Name	📊 Default	📝 Description	📖 Page
SS_MEDIA_PROXY_MODE	0	Media proxy mode (0=disabled, 1=enabled)	237
SS_MEDIA_PROXY_PORT_RANGE	40000,59999	Port range for media proxy RTP traffic	237
SS_MAX_CALL_DURATION	0	Maximum call duration in seconds (0=unlimited)	237
SS_ENDPOINT_EXPIRE	3600	Terminal registration expiry time in seconds	237
SS_GATEWAY_ASR_RESERVE_TIME	600	ASR reserve time for gateway in seconds	238
SS_GATEWAY_ACD_RESERVE_TIME	600	ACD reserve time for gateway in seconds	238

🚫 Dynamic Black List Parameters

⚙️ Parameter Name	📊 Default	📝 Description
SS_BLACK_LIST_CALLER_MALICIOUS_CALL_LIMIT	1000	Max calls triggering malicious call blocking
SS_BLACK_LIST_CALLER_MALICIOUS_CALL_EXPIRE	3600	Duration for malicious call block in seconds
SS_BLACK_LIST_NO_ANSWER_LIMIT	100	Consecutive no-answer calls triggering block
SS_BLACK_LIST_NO_ANSWER_EXPIRE	3600	Duration for no-answer block in seconds

🎵 Audio Service Parameters in VOS3000 Parameter Description

Reference: VOS3000 2.1.9.07 Manual, Section 4.3.5.3 (Pages 239-241)

Audio service parameters control the IVR (Interactive Voice Response) system, voicemail functionality, callback services, and other value-added audio features in VOS3000. These parameters determine codec priorities, language settings, timeout values, and session behavior for audio services.

⚙️ Parameter Name	📊 Default	📝 Description	📖 Page
IVR_CODEC_PRIORITY	G.711A,G.711U,G.729,G.723	Codec priority for IVR media	239
IVR_DEFAULT_LANGUAGE	en	Default language for IVR prompts	239
IVR_MEDIA_CHECK_TIME_OUT	3000	Media check timeout in milliseconds	240
IVR_RINGING_TIMEOUT	60	Ringing timeout in seconds	240
IVR_SIP_SESSION_TTL	600	SIP session TTL for IVR calls	240
IVR_VOICEMAIL_MAX_DURATION	120	Maximum voicemail duration in seconds	241

⚙️ VOS3000 Parameter Description Best Practices

Implementing effective VOS3000 parameter description management requires adherence to established best practices that minimize risk and ensure system stability. The following recommendations are derived from extensive deployment experience and reflect industry-standard approaches to configuration management.

📋 Change Management Recommendations

Document current settings: Before making any changes, record the current parameter value and description for rollback reference.
Research parameter function: Review the parameter description in the interface and consult the VOS3000 manual to fully understand the parameter’s purpose.
Test before production: Always test parameter changes in a non-production environment before applying to production systems.
Apply changes during maintenance windows: Plan parameter changes during periods when temporary service interruption is acceptable.
Verify after changes: Confirm that parameter changes produce the expected behavior and do not cause unintended side effects.

🔧 Parameter Optimization Tips

🏢 Scenario	⏱️ SESSION_TTL	📡 NAT_PERIOD	🚫 MAX_DURATION
Standard VoIP Wholesale	600 (10 min)	30 sec	0 (unlimited)
Call Center Operations	900 (15 min)	20 sec	14400 (4 hrs)
Mobile/Unstable Networks	300 (5 min)	15 sec	3600 (1 hr)
Enterprise PBX	1200 (20 min)	30 sec	28800 (8 hrs)

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Need professional help with VOS3000 parameter description configuration? Our team provides comprehensive VOS3000 services including installation, configuration, and ongoing technical support.

📦 Service	📝 Description	💼 Includes
VOS3000 Installation	Complete server setup	OS, VOS3000, Database, Security
Parameter Configuration	Optimize for your environment	SIP, H323, Billing, Security tuning
Technical Support	24/7 remote assistance	Troubleshooting, Debug, Analysis

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❓ Frequently Asked Questions about VOS3000 Parameter Description

What is the most important VOS3000 parameter description for billing accuracy?

The SERVER_BILLING_FEE_PRECISION and SERVER_BILLING_FEE_UNIT parameters are critical for billing accuracy. These parameters control the decimal precision and billing unit for charge calculations. Configure these parameters according to your business requirements and regulatory requirements for billing precision.

How do I enable NAT keep-alive in VOS3000 parameter description?

To enable NAT keep-alive, set SS_SIP_NAT_KEEP_ALIVE_MESSAGE to a non-empty value (default is “HELLO”). If this parameter is empty, NAT keep-alive is disabled. Configure SS_SIP_NAT_KEEP_ALIVE_PERIOD to control the interval between keep-alive transmissions (default is 30 seconds).

What happens if I set SS_SIP_SESSION_TTL too low?

Setting SS_SIP_SESSION_TTL too low (below 90 seconds) may cause frequent session refresh messages, increasing network traffic and potentially causing call quality issues. The minimum recommended value is 90 seconds as specified in RFC 4028. Values below this may trigger “422 Session Interval Too Small” errors from endpoints.

How do I disable automatic report generation?

To disable automatic generation of specific reports, set the corresponding SERVER_REPORT_ parameter to “Off” in the System Parameter interface. For example, to disable the Agent Income Report, set SERVER_REPORT_AGENT_INCOME to “Off”. Disabled reports can still be generated manually through the client interface.

Can I use VOS3000 parameter description to limit maximum call duration?

Yes, use the SS_MAX_CALL_DURATION parameter to limit the maximum call duration for all calls. Set the value in seconds (0 means unlimited). This parameter is useful for preventing runaway calls and controlling costs. Individual accounts may have additional duration limits configured in their settings.

Where can I get help with VOS3000 parameter description configuration?

MultaHost provides comprehensive technical support for VOS3000 parameter description configuration. Our experienced team can assist with parameter selection, configuration best practices, and troubleshooting. For immediate assistance, contact us via WhatsApp at +8801911119966. Additional resources are available at vos3000.com/downloads.php.

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SIP ALG Problems, VOS3000 gateway configuration, VoIP Fraud Prevention, VOS3000 Media Proxy, VOS3000 Call Termination Reasons

VOS3000 Media Proxy and System Parameters: Complete Important Configuration Reference

March 31, 2026March 31, 2026 king

VOS3000 Media Proxy and System Parameters: Complete Configuration Reference

VOS3000 media proxy and system parameters control the core functionality of your VoIP softswitch. Proper configuration of these parameters determines call quality, NAT traversal success, security levels, and overall system performance. This comprehensive reference guide covers all critical parameters from the official VOS3000 2.1.9.07 manual, explaining their functions and recommended configurations for different deployment scenarios.

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📡 Understanding Media Proxy in VOS3000

Media proxy determines whether RTP (Real-time Transport Protocol) voice packets flow directly between endpoints or through the VOS3000 server. This decision has significant implications for NAT traversal, audio quality, server resource usage, and call reliability.

📊 VOS3000 Media Proxy Modes

The SS_MEDIAPROXYMODE parameter controls media proxy behavior with four distinct modes:

Mode	Behavior	Server Load	Best Use Case
Off	Never proxy media; RTP flows directly between endpoints	Lowest	Public IP endpoints, no NAT issues
On	Always proxy all media through server	Highest	Troubleshooting, maximum control
Auto	Intelligent decision based on conditions	Variable	Mixed environments, recommended
Must On	Forced proxy regardless of other settings	Highest	Specific debugging scenarios only

⚙️ Media Proxy Auto Mode Decision Logic (VOS3000 Media Proxy)

When SS_MEDIAPROXYMODE is set to “Auto,” VOS3000 follows a precise decision algorithm to determine whether media proxy is needed:

Media Proxy Decision Steps (Auto Mode):

Step 1: Check if caller or callee MUST have media proxy
        ├── If gateway/phone has Media Proxy = Must On
        └── Result: ENABLE media proxy

Step 2: Check if caller or callee has Media Proxy disabled
        ├── If gateway/phone has Media Proxy = Off
        └── Result: DISABLE media proxy

Step 3: Check if caller or callee has Media Proxy enabled
        ├── If gateway/phone has Media Proxy = On
        └── Result: ENABLE media proxy

Step 4: Check if callee has local ring enabled
        ├── Local ring requires media proxy for ringback tone
        └── Result: ENABLE media proxy

Step 5: Check for dynamic registration with encryption
        ├── If phone/gateway uses dynamic register AND encryption
        └── Result: ENABLE media proxy

Step 6: Check cross-network routing (SS_MEDIAPROXYBETWEENNET)
        ├── If caller and callee from different networks
        └── Result: ENABLE media proxy

Step 7: Check NAT conditions (SS_MEDIAPROXYBEHINDNAT)
        ├── If phone and gateway in same NAT, SS_MEDIAPROXYSAMENAT = On
        ├── If phone and gateway in different NAT, one in private network
        └── Result: ENABLE media proxy

Step 8: Default action
        └── Result: DISABLE media proxy

🔧 Configuring Media Proxy Parameters

📍 Location in VOS3000 Client

Navigation Path:
Operation Management → Softswitch Management → Additional Settings → System Parameter

Parameter Name: SS_MEDIAPROXYMODE
Valid Values: Off, On, Auto, Must On
Default Value: Auto

Related Parameters:
┌─────────────────────────────────────────────────────────────┐
│ Parameter Name                  │ Description               │
├─────────────────────────────────────────────────────────────┤
│ SS_MEDIAPROXYBETWEENNET        │ Proxy for cross-network   │
│ SS_MEDIAPROXYBEHINDNAT         │ Proxy for behind-NAT      │
│ SS_MEDIAPROXYSAMENAT           │ Proxy for same-NAT        │
└─────────────────────────────────────────────────────────────┘

📡 RTP Port Configuration (VOS3000 Media Proxy)

RTP port configuration determines which UDP ports VOS3000 uses for voice media streams. Proper configuration is essential for firewall rules and capacity planning. VOS3000 Media Proxy

📊 RTP Port Parameters VOS3000 Media Proxy

Parameter	Default Value	Description
SS_RTP_PORT_RANGE	10000,39999	UDP port range for RTP media streams
SS_H245_PORT_RANGE	10000,39999	H.245 port range for H.323 calls
IVR_RTP_PORT	40000,47999	RTP port range for IVR services

⚙️ RTP Port Sizing Calculation

RTP Port Capacity Planning:

Each concurrent call uses 2 RTP ports (one for each direction)
Port Range: 10000-39999 = 30,000 ports
Maximum Concurrent Calls = 30,000 / 2 = 15,000 calls

However, consider:
- Each port allocation has overhead
- IVR services need separate port range
- H.323 calls share same range

Recommended Configuration by Capacity:
┌──────────────────────────────────────────────────────────────┐
│ Expected Capacity │ RTP Port Range    │ IVR Port Range      │
├──────────────────────────────────────────────────────────────┤
│ Small (<500 CC)   │ 10000-19999       │ 40000-40999         │
│ Medium (500-2000) │ 10000-29999       │ 40000-41999         │
│ Large (2000-5000) │ 10000-39999       │ 40000-44999         │
│ Enterprise (5000+)│ 10000-59999       │ 60000-64999         │
└──────────────────────────────────────────────────────────────┘

Firewall Rule Example:
iptables -A INPUT -p udp --dport 10000:39999 -j ACCEPT
iptables -A INPUT -p udp --dport 40000:47999 -j ACCEPT

🔑 SIP Parameters Reference – VOS3000 Media Proxy

SIP parameters control how VOS3000 handles SIP signaling, authentication, and session management. These parameters directly impact call setup success and session reliability.

📊 Critical SIP Parameters

Parameter	Default	Purpose
SS_SIP_NAT_KEEP_ALIVE_MESSAGE	HELLO	Content of NAT keep-alive message
SS_SIP_NAT_KEEP_ALIVE_PERIOD	30	Keep-alive interval in seconds (10-86400)
SS_SIP_NAT_KEEP_ALIVE_SEND_INTERVAL	500	Interval between sending keep-alives (ms)
SS_SIP_NAT_KEEP_ALIVE_SEND_ONE_TIME	3000	Number of keep-alives sent per batch
SS_SIP_SESSION_TTL	1800	Session Timer TTL in seconds
SS_SIP_SESSION_UPDATE_SEGMENT	300	Session update interval in seconds
SS_SIP_RESEND_INTERVAL	0.5,1,2,4,4,4,4,4,4,4	SIP message resend intervals (seconds)
SS_SIP_NO_TIMER_REINVITE_INTERVAL	7200	Max call time for non-timer SIP clients

⚙️ NAT Keep-Alive Configuration

NAT Keep-Alive Purpose:
- Maintains NAT binding for devices behind NAT
- Prevents one-way audio caused by expired bindings
- Essential for devices that don't support SIP Timer

How It Works:
1. VOS3000 sends UDP message to registered device IP
2. Message content = SS_SIP_NAT_KEEP_ALIVE_MESSAGE (default: "HELLO")
3. Sent every SS_SIP_NAT_KEEP_ALIVE_PERIOD seconds (default: 30)
4. This keeps the NAT mapping active

Configuration Example:
SS_SIP_NAT_KEEP_ALIVE_MESSAGE = "HELLO"
SS_SIP_NAT_KEEP_ALIVE_PERIOD = 30
SS_SIP_NAT_KEEP_ALIVE_SEND_INTERVAL = 500
SS_SIP_NAT_KEEP_ALIVE_SEND_ONE_TIME = 3000

This means:
- Send "HELLO" to each device every 30 seconds
- Wait 500ms between sending to different devices
- Process 3000 devices in each batch

Scaling Notes:
- 3000 devices × 500ms = 25 minutes to process all
- Adjust SEND_ONE_TIME for large deployments
- Increase SEND_INTERVAL if network is slow

🔐 Authentication Parameters

Authentication parameters control how VOS3000 handles SIP authentication challenges and account lockout policies for security.

📊 Authentication Security Parameters

Parameter	Default	Purpose
SS_AUTHENTICATION_MAX_RETRY	6	Max auth retries before suspension (0-999)
SS_AUTHENTICATION_FAILED_SUSPEND	180	Suspension duration in seconds (60-3600)
SS_SIP_AUTHENTICATION_CODE	Unauthorized(401)	SIP response code for auth challenge
SS_SIP_AUTHENTICATION_TIMEOUT	10	Timeout for SIP authentication in seconds
SS_SIP_AUTHENTICATION_RETRY	6	SIP auth retry count for 401/407 responses

⚙️ Authentication Lockout Configuration

Security Configuration Example:

For High-Security Environments:
SS_AUTHENTICATION_MAX_RETRY = 3
SS_AUTHENTICATION_FAILED_SUSPEND = 300

For Standard Environments:
SS_AUTHENTICATION_MAX_RETRY = 6
SS_AUTHENTICATION_FAILED_SUSPEND = 180

For Relaxed Environments (trusted networks only):
SS_AUTHENTICATION_MAX_RETRY = 10
SS_AUTHENTICATION_FAILED_SUSPEND = 60

How Lockout Works:
1. Device attempts registration with wrong password
2. VOS3000 returns 401 Unauthorized
3. Device retries (up to SS_AUTHENTICATION_MAX_RETRY times)
4. After max retries, IP is added to temporary block list
5. Block lasts for SS_AUTHENTICATION_FAILED_SUSPEND seconds
6. After timeout, device can retry

This protects against:
- Brute force password attacks
- SIP flood attacks
- Credential guessing
- Automated hacking tools

📊 Session Timer Configuration (VOS3000 Media Proxy)

Session timers ensure that hung calls are detected and cleaned up, preventing “ghost calls” and billing errors.

⚙️ Session Timer Parameters

Session Timer Configuration:

SS_SIP_SESSION_TTL = 1800 (30 minutes)
SS_SIP_SESSION_UPDATE_SEGMENT = 300 (5 minutes)
SS_SIP_NO_TIMER_REINVITE_INTERVAL = 7200 (2 hours)

How SIP Session Timer Works:
1. During call setup, session timer is negotiated
2. VOS3000 sends UPDATE or re-INVITE at interval
3. If no response, session is considered dead
4. Call is terminated and CDR is generated

For Non-Timer-Capable Clients:
- SS_SIP_NO_TIMER_REINVITE_INTERVAL sets max call time
- After this duration, call is terminated
- Prevents ultra-long "zombie" calls

Recommended Values:
┌────────────────────────────────────────────────────────────┐
│ Scenario           │ TTL  │ Update Segment │ Max No-Timer │
├────────────────────────────────────────────────────────────┤
│ Standard VoIP      │ 1800 │ 300            │ 7200         │
│ High-Volume Trunk  │ 3600 │ 600            │ 14400        │
│ Calling Card       │ 900  │ 180            │ 3600         │
│ Enterprise PBX     │ 1800 │ 300            │ 28800        │
└────────────────────────────────────────────────────────────┘

Session Timer Benefits:
- Detects hung calls automatically
- Prevents billing discrepancies
- Reduces "ghost call" complaints
- Frees system resources

🎯 H.323 Parameters Reference

For environments using H.323 protocol, VOS3000 provides comprehensive parameter controls.

📊 Critical H.323 Parameters

Parameter	Default	Purpose
SS_H245_PORT_RANGE	10000,39999	Port range for H.245 control channel
SS_H323_DTMF_METHOD	H.245 alphanumeric	Default DTMF transmission method
SS_H323_TIMEOUT_ALERTING	120	Timeout for alerting state (seconds)
SS_H323_TIMEOUT_CALLPROCEEDING	20	Timeout for call proceeding (seconds)
SS_H323_TIMEOUT_SETUP	5	Timeout for call setup (seconds)

📈 Quality of Service (QoS) Parameters

QoS parameters control the DSCP marking on IP packets for prioritization in managed networks.

⚙️ QoS Configuration

QoS Parameters:

SS_QOS_SIGNAL = 0xa0 (default)
- DSCP marking for SIP/H.323 signaling packets
- Hex value applied to IP header ToS field

SS_QOS_RTP = 0xa0 (default)
- DSCP marking for RTP media packets
- Hex value applied to IP header ToS field

DSCP Value Reference:
┌─────────────────────────────────────────────────────────────┐
│ Hex Value │ Binary  │ DSCP Class        │ Description      │
├─────────────────────────────────────────────────────────────┤
│ 0x00      │ 000000  │ Best Effort       │ Default, no QoS  │
│ 0x20      │ 001000  │ CS1               │ Scavenger        │
│ 0x40      │ 010000  │ CS2               │ OAM              │
│ 0x60      │ 011000  │ CS3               │ Signaling        │
│ 0x80      │ 100000  │ CS4               │ Real-time        │
│ 0xa0      │ 101000  │ CS5 / EF          │ Voice (default)  │
│ 0xc0      │ 110000  │ CS6               │ Network control  │
└─────────────────────────────────────────────────────────────┘

When to Configure:
- Only in managed networks with QoS policies
- Coordinate with network team on DSCP values
- Match router/switch QoS configuration

📊 Billing and CDR Parameters

These parameters control billing precision and CDR generation behavior. VOS3000 Media Proxy

⚙️ Critical Billing Parameters

Parameter	Default	Purpose
SERVER_BILLING_HOLD_TIME_PRECISION	50	Billing time precision in milliseconds
SERVER_MAX_CDR_PENDING_LIST_LENGTH	100000	Max pending CDR queue length
SERVER_CDR_FILE_WRITE_MAX	2048	Max CDR files to retain
SERVER_CDR_FILE_WRITE_INTERVAL	60	CDR file write interval (seconds)

📖 VOS3000 Extended Firewall Configuration
📖 VOS3000 One-Way Audio Troubleshooting
📖 VOS3000 Server Configuration Guide
📖 VOS3000 FAQ Based on Official Manual
📖 VOS3000 Downloads

❓ Frequently Asked Questions

Should I set media proxy to On or Auto?

Auto mode is recommended for most deployments. It intelligently enables media proxy only when needed (NAT traversal, encryption, cross-network calls) while allowing direct RTP when possible. This provides the best balance of reliability and server resource usage.

How do I know if my RTP port range is sufficient?

Calculate: Each concurrent call uses 2 RTP ports. With default range 10000-39999 (30,000 ports), you can support 15,000 concurrent calls. Monitor port usage through system performance monitoring. If you see port allocation errors, increase the range or reduce concurrent call load.

Why do calls drop at 30 seconds?

This typically indicates SIP session timer or NAT binding issues. Check SS_SIP_SESSION_TTL and ensure NAT keep-alive is configured. The 30-second timeout often corresponds to NAT binding expiry when keep-alives are not working.

What is the best authentication retry setting?

For most environments, the default of 6 retries with 180-second suspension works well. For high-security environments, reduce to 3 retries with longer suspension (300+ seconds). Balance security against false positives from legitimate users mistyping passwords.

How do I troubleshoot media proxy issues?

Use Debug Trace in VOS3000 to capture SIP and SDP messages. Check if media proxy is being invoked (look at the c= line in SDP). Verify that RTP ports are within configured range. Check firewall rules allow both signaling and RTP ports.

📞 Get Expert Help with VOS3000 Configuration

Need assistance optimizing VOS3000 parameters for your specific deployment? Our team provides professional VOS3000 installation, configuration, and performance tuning services.

📱 WhatsApp: +8801911119966

📞 Need Professional VOS3000 Setup Support?

For professional VOS3000 installations and deployment, VOS3000 Server Rental Solution:

📱 WhatsApp: +8801911119966
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📥 Downloads: VOS3000 Downloads

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VOS3000 System Parameters & Timers: Important Guide

March 8, 2026March 8, 2026 king

VOS3000 System Parameters & Timers: Important Guide

VOS3000 contains hundreds of configurable parameters that control every aspect of its operation – from SIP timers and H.323 settings to billing rules and alarm thresholds. Understanding these VOS3000 system parameters is essential for tuning performance, troubleshooting issues, and customizing the platform to your specific needs.

This comprehensive reference covers the most important parameters grouped by category, with explanations of what they do and when you might need to change them.

Where to Find VOS3000 System Parameters

VOS3000 parameters are spread across two main locations:

System Management > System Parameter – server‑level parameters (database, reports, passwords, etc.)
Operation Management > Softswitch Management > Additional Settings > System Parameter – softswitch runtime parameters (SIP, H.323, media, routing)

Changes to parameters take effect immediately – no service restart required in most cases.

VOS3000 Server Parameters (System Management)

These parameters control the VOS3000 server environment, database behavior, and reporting.

Parameter Name	Default Value	Description	When to Change
`SERVER_BILLING_FEE_PRECISION`	0.0000000	Number of decimal places for billing amounts.	If you need more/less precision in call charges (e.g., 4 decimals for fractional cents).
`SERVER_BILLING_HOLD_TIME_PRECISION`	1000	Time rounding precision in milliseconds. E.g., 50 means round to nearest 50ms.	Adjust to match your carrier’s billing increments (6 seconds = 6000).
`SERVER_QUERY_ONE_PAGE_SIZE`	10000	Number of records displayed per page in CDR queries.	Increase if you want to see more records at once (may slow down browser).
`SERVER_QUERY_CDR_MAX_DAY_INTERVAL`	31	Maximum number of days allowed in a single CDR query.	Increase for longer reports, but beware of performance impact.
`SERVER_ALARM_EMAIL`	(empty)	Email address for alarm notifications.	Set to receive email alerts when alarms trigger.
`SERVER_ALARM_ENABLE_EMAIL`	Off	Enable/disable email alarms.	Turn On after configuring email settings.
`SERVER_PASSWORD_LENGTH`	8	Minimum password length for new users.	Increase for better security (e.g., 12).
`SERVER_PAY_DELAY_CUSTOMER_EXPIRE_DAY`	365	Days added to account expiry after recharge.	Adjust based on your recharge policies.
`SERVER_REPORT_*`	Various	Enable/disable automatic generation of daily reports.	Turn off reports you don’t need to save server resources.

Softswitch SIP Parameters (VOS3000 System Parameters)

These parameters control SIP signaling behavior and are critical for interoperability with carriers and devices.

Parameter Name	Default Value	Description	When to Change
`SS_SIP_TIMEOUT_INVITE`	10	Seconds to wait for a response to INVITE before trying next gateway.	Increase if carriers are slow to respond; decrease to fail faster.
`SS_SIP_TIMEOUT_RINGING`	120	Seconds to wait for answer after receiving ringing (180).	Adjust for markets where users take longer to answer.
`SS_SIP_TIMEOUT_TRYING`	20	Seconds to wait for 100 Trying after INVITE.	Increase if carriers don’t send early progress.
`SS_SIP_TIMEOUT_SESSION_PROGRESS`	20	Seconds to wait for 183 Session Progress.	Some carriers send 183 very late – increase if calls fail prematurely.
`SS_SIP_TIMEOUT_SESSION_PROGRESS_SDP`	120	Seconds to wait for 183 with SDP (early media).	Increase if early media takes time to arrive.
`SS_SIP_STOP_SWITCH_AFTER_SDP`	On	Stop trying other gateways after receiving SDP (media negotiation started).	Turn Off if you want to continue trying better gateways even after SDP received.
`SS_SIP_RESEND_INTERVAL`	0.5,1,2,4,4,4,4,4,4,4	Comma‑separated retransmission intervals (seconds) for SIP messages.	Customize for networks with high packet loss (longer intervals).
`SS_SIP_SESSION_TTL`	600	Session timer interval (seconds) for keeping calls alive.	Shorter for aggressive dead‑call detection; longer to reduce signaling.
`SS_SIP_NO_TIMER_REINVITE_INTERVAL`	7200	Maximum call duration (seconds) for non‑timer‑aware SIP devices.	Force hangup of very long calls to prevent billing errors.
`SS_SIP_NAT_KEEP_ALIVE_PERIOD`	30	Seconds between NAT keep‑alive messages.	Reduce if devices behind NAT drop pinholes quickly.

Softswitch H.323 Parameters (VOS3000 System Parameters)

For networks using H.323 gateways or terminals.

Parameter Name	Default Value	Description	When to Change
`SS_H323_TIMEOUT_SETUP`	5	Seconds to wait for Call Proceeding after Setup.	Increase if H.323 gateways are slow.
`SS_H323_TIMEOUT_CALLPROCEEDING`	20	Seconds to wait for Alerting after Call Proceeding.	Adjust based on typical answer times.
`SS_H323_TIMEOUT_ALERTING`	120	Seconds to wait for Connect after Alerting.	Same as SIP ringing timeout.
`SS_H323_TIMEOUT_CALLPROCEEDING_OLC`	20	Seconds to wait for OLC (Open Logical Channel) after Call Proceeding.	Increase if media negotiation is slow.
`SS_H323_STOP_SWITCH_AFTER_OLC`	Off	Stop trying other gateways after OLC (media opened).	Turn On if you want to lock the gateway once media starts.

System‑Wide Softswitch Parameters

These affect overall call handling and routing logic.

Parameter Name	Default Value	Description	When to Change
`SS_MAX_CALL_DURATION`	None	Global maximum call length in seconds.	Set to prevent extremely long calls (e.g., 10800 for 3 hours).
`SS_MEDIA_PROXY_MODE`	Auto	Media proxy decision: Auto, On, Off, Must On.	Force On if you need recording or NAT traversal for all calls.
`SS_MEDIA_PROXY_PORT_RANGE`	10000,39999	RTP port range for media proxy.	Adjust if you need to limit firewall rules.
`SS_GATEWAY_ASR_CALCULATE`	Off	Enable real‑time ASR (Answer Seizure Ratio) calculation for routing.	Turn On to use ASR as a routing metric.
`SS_GATEWAY_ACD_CALCULATE`	Off	Enable real‑time ACD (Average Call Duration) calculation.	Turn On to use ACD in routing decisions.
`SS_GATEWAY_SWITCH_UNTIL_CONNECT`	Off	Continue trying gateways until one answers (not just until ringing).	Useful when carriers rarely answer but you want to try all options.
`SS_REDIRECT_OFFLINE_PHONE_TO_GATEWAY`	Off	If a called phone is offline, try routing through gateways.	Useful for hybrid networks where phones may not always register.
`SS_ACCOUNT_INDICATION_METHOD`	Off	How to warn of low balance: Off, Prompt balance, Prompt duration.	Enable to play warnings to callers before cutoff.

Audio Service (IVR) Parameters

Controls for IVR, callback, and value‑added services.

Parameter Name	Default Value	Description	When to Change
`IVR_RINGING_TIMEOUT`	120	Seconds to wait for answer in IVR scenarios.	Adjust for different user behavior.
`IVR_SETUP_TIMEOUT`	20	Seconds to wait for initial response.	Increase if IVR connections are slow.
`IVR_MEDIA_CHECK_TIMEOUT`	2	Minutes of no media before hanging up.	Reduce to free ports faster on dead calls.
`IVR_CODEC_PRIORITY`	g729a,g729,g723,g711a,g711u	Preferred codec order for IVR.	Reorder based on your termination costs/quality.

Best Practices for Parameter Tuning – VOS3000 System Parameters

Change one parameter at a time and observe the effect.
Document your changes – keep a record of what you changed and why.
Test in a non‑production environment first if possible.
Be conservative with timeouts – too short causes failures, too long wastes resources.
Monitor call logs after changes to detect unintended consequences.

Frequently Asked Questions (VOS3000 System Parameters)

Do I need to restart VOS3000 after changing parameters?

No. VOS3000 reads parameters from the database in real time. Changes take effect immediately for new calls. Ongoing calls continue with the parameters they started with.

Can I break my system by changing a parameter?

Most parameters are safe to experiment with, but extreme values (e.g., setting timeouts to 0) can cause unexpected behavior. Always note the original value so you can revert if needed.

What’s the most important parameter for reducing call failures?

For SIP, start with SS_SIP_TIMEOUT_INVITE and SS_SIP_RESEND_INTERVAL. If carriers are slow to respond, increasing these can reduce “Response timeout” failures.

How do I enable NAT keep‑alive for SIP devices?

Set SS_SIP_NAT_KEEP_ALIVE_PERIOD to 20‑30 seconds and SS_SIP_NAT_KEEP_ALIVE_MESSAGE to “HELLO” or any string. The softswitch will send UDP packets to keep NAT bindings open.

What does “SS_MEDIAPROXYMODE = Auto” actually do?

Auto mode enables media proxy only when needed – e.g., when devices are behind different NATs, when encryption is required, or when a device explicitly requests it. This is the recommended setting for most deployments.

Conclusion

Mastering VOS3000 system parameters gives you fine‑grained control over your softswitch. Use this reference as a starting point, experiment carefully, and always monitor the impact of your changes. With the right tuning, you can maximize call completion rates, improve voice quality, and optimize resource usage.

Need expert help with VOS3000 configuration or performance tuning? Contact us on WhatsApp: +8801911119966

Further Resources

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VOS3000 Server Rent – Dedicated Best VoIP Servers with Pre-Installed VOS3000 2.1.9.07 for High Concurrent Calls

VOS3000 2.1.9.07 New Version Powerful Features Upgrade Guide Complete

Table of Contents

📡 Overview of V2.1.9.07 as the Latest Stable Release

🔧 Key New Features Compared to V2.1.8.x

📡 Enhanced SIP Protocol Support Improvements

💰 Improved Billing Precision Parameters

🔐 Better Security Features

🛤️ Gateway Failover Enhancements with ASR-Based Routing

🌐 Web API V2.1.9.07 Improvements

🎵 IVR Module Enhancements

🎤 Media Proxy and Transcoding Improvements

🔄 Upgrade Path from V2.1.8.0 / V2.1.8.05 to V2.1.9.07

🖥️ CentOS 7 Support and Kernel Compatibility

⚙️ New Server Parameters Added in V2.1.9.07

🎛️ New Softswitch Parameters Added in V2.1.9.07

▶️ Service Start and Restart Commands for V2.1.9.07

🌐 Client Software Changes: Chinese to English Client Fix

⚠️ Common Issues When Upgrading and How to Solve Them

🏆 Why Operators Should Upgrade to VOS3000 2.1.9.07 New Version

❓ Frequently Asked Questions About VOS3000 2.1.9.07 New Version

❓ Can I upgrade directly from V2.1.8.0 to V2.1.9.07?

❓ Does V2.1.9.07 include a complete web management interface?

❓ How long does the upgrade to V2.1.9.07 take?

❓ Is CentOS 7 required for V2.1.9.07?

❓ What happens to my existing rate tables after upgrade?

❓ Can I roll back to V2.1.8.x if the upgrade fails?

📞 Need Professional VOS3000 Setup Support?

Sistema VOS3000 Registro Salida SIP Complete: Expiracion, Reintento, Privacidad y Dominio Local

Table of Contents

🌐 Introduccion al Registro SIP de Salida en VOS3000

📤 Tres Parametros de Registro de Salida

🔒 Cabecera de Privacidad SIP (USER_AGENT_PRIVACY)

🏷️ Reescritura de Dominio Local

📱 Manejo de Display From SIP (E164_DISPLAY_FROM)

🔀 Ruteo SIP Via Contact Header

📋 Transparencia de Cabeceras Extra SIP

📋 Checklist de Configuracion para Proveedores SIP

🔧 Configuracion Paso a Paso del Registro de Salida

❓ Preguntas Frecuentes sobre el Sistema VOS3000 Registro Salida SIP

❓ Como configurar el registro SIP de salida en VOS3000?

❓ Por que el proveedor rechaza mi registro SIP?

❓ Que es SEND_UNREGISTER y cuando usarlo?

❓ Cuando necesito habilitar el dominio local?

❓ Como resolver problemas de ruteo asimetrico con gateways detras de NAT?

❓ Que cabeceras SIP extra debo permitir?

📞 Need Professional VOS3000 Setup Support?

VOS3000 CDR End Direction Critical Call Termination Party Detection

Table of Contents

🔐 What Is VOS3000 CDR End Direction?

📋 Official Manual Definition

📊 End Direction Code 0: Caller Hangup

📋 Analysis Implications of Caller Hangup

📊 End Direction Code 1: Callee Hangup

📋 Analysis Implications of Callee Hangup

📊 End Direction Code 2: Server Hangup

📋 When Does Server Hangup Occur?

📋 End Direction and Billing Dispute Resolution

📊 End Direction and Call Quality Analysis

📋 End Direction Distribution Analysis

📋 End Direction by Gateway Analysis

📋 End Direction and Session Timer Interaction

🛡️ Common End Direction Analysis Problems and Solutions

❌ Problem 1: Excessive Server Hangups (endDirection = 2)

❌ Problem 2: Billing Disputes Where Customer Claims Call Dropped

❌ Problem 3: Short Callee Hangups Indicating Traffic Quality Issues

💡 End Direction Best Practices

❓ Frequently Asked Questions

❓ What does VOS3000 CDR end direction 2 mean?

❓ How do I determine why a server hangup occurred?

❓ Does endDirection affect billing calculations?

❓ Can the endDirection value be incorrect?

❓ How is endDirection different from endReason in VOS3000 CDR?

❓ Should I always record CDRs for server-initiated hangups?

📞 Need Expert Help with VOS3000 CDR End Direction?

📞 Need Professional VOS3000 Setup Support?

VOS3000 CDR Text File Export Complete Pipe-Delimited Format Guide

Table of Contents

🔐 What Is VOS3000 CDR Text File Export?

📋 SS_CDR_RECORD_TO_FILE — The Master Switch

📋 SS_CDR_RECORD_NONCONNECT — Zero-Duration Call Export