VOS3000 session timer, VOS3000 call end reasons, VOS3000 Work Calendar, VOS3000 geofencing, VOS3000软交换参数优化, VOS3000错误代码大全, VOS3000账户权限管理

VOS3000 Call End Reasons: Complete Error Code Reference Guide

April 7, 2026April 7, 2026 king

VOS3000 Call End Reasons: Complete Error Code Reference Guide

VOS3000 call end reasons provide the definitive diagnostic information for understanding why VoIP calls fail, disconnect, or terminate abnormally. Every call processed through VOS3000 generates detailed termination data in the CDR (Call Detail Record) that identifies the exact reason for call completion. This comprehensive reference guide documents all server-side termination reasons, client error codes, SIP response mappings, and H.323 cause codes based on the official VOS3000 2.1.9.07 manual.

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🔍 Understanding VOS3000 Call End Reasons

Reference: VOS3000 2.1.9.07 Manual, Section 4.5 (Pages 244-249)

When a call terminates in VOS3000, the system records the termination reason in multiple CDR fields. Understanding these reasons is essential for maintaining call quality, optimizing routes, and troubleshooting recurring issues. The termination reason indicates whether the call ended normally, was rejected, timed out, or failed due to system configuration.

📊 Where to Find VOS3000 Call End Reasons

📍 Location	🧭 Navigation Path	📋 Information Available
Recent CDR	Data Query → Recent CDR	Latest calls with termination reason column
CDR Query	Data Query → CDR	Historical CDR with advanced filtering
Call Analysis	Operation Management → Business Analysis	Detailed SIP/H.323 signaling trace
Debug Trace	System → Debug trace	Real-time SIP message capture
Database Direct	MySQL vos3000_cdr table	Raw CDR data for custom analysis

📋 Complete VOS3000 Server-Side Termination Reasons

Reference: VOS3000 2.1.9.07 Manual, Section 4.5 (Pages 244-249)

Server-side termination reasons are generated by VOS3000 when the softswitch itself terminates or rejects the call. These reasons provide the most detailed diagnostic information as they indicate the exact condition that prevented call completion. (VOS3000 Call End Reasons)

🚨 Termination Reason	📋 Description	🔍 Typical Cause	✅ Solution	📖 Page
Account Locked	The account is currently locked/disabled	Admin locked account, security trigger	Account Management → Change Status to Active	244
Account Disabled	Account status is disabled	Account deactivated by admin	Enable account in account management	244
Account Expired	Account validity period has ended	Expiry date passed	Extend expiry date (set to 2099-12-31)	244
Insufficient Balance	Account balance too low for call	Balance < rate for destination	Add credit to account	244
No Matching Account	No account found to bill the call	Caller ID not mapped to account	Create account or fix caller ID mapping	245
Account Not Online	Called account not registered	Phone endpoint offline	Check phone registration status	245

🚨 Termination Reason	📋 Description	🔍 Typical Cause	✅ Solution	📖 Page
NoAvailableRouter	No routing gateway available	No gateway configured for destination	Add routing gateway with correct prefix	245
Not Found	Destination number not found	Prefix mismatch in gateway	Check gateway prefix configuration	245
No Matching Rate	No rate found for destination	Rate table missing prefix	Add rate entry for destination prefix	245
The Called Not Online	Called device not reachable	Gateway offline or no capacity	Check gateway status and capacity	245
Connection Limit Exceeded	Maximum concurrent calls reached	Line limit reached on account/gateway	Increase line limit or add capacity	246
Unregistered	Endpoint not registered	Registration expired or failed	Verify device registration settings	246
Rate Table Not Found	No rate table assigned	Account missing rate table	Assign rate table to account	246

🚨 Termination Reason	📋 Description	⚙️ Related Parameter	✅ Solution	📖 Page
Response Timeout	No answer from called party	SS_TIMEOUT_PHONE_HANGUP	Increase alerting timeout, check endpoint	246
Connection Timeout	No SIP response after retries	SS_SIP_SEND_RETRY, SS_SIP_RESEND_INTERVAL	Check network, firewall, gateway status	246
Proceeding Timeout	No 100 Trying progress	Gateway proceeding timeout	Check gateway connectivity	247
Session Timeout	Session timer refresh failed	SS_SIP_SESSION_TTL	Check session timer config, NAT keep-alive	247
Connection Establishment Timeout	Call setup incomplete	Mapping gateway timeout	Check gateway response time	247
Alerting Timeout	Ring timeout exceeded	Gateway alerting timer	Increase ring timeout in gateway config	247

🔴 Number Restriction Termination Reasons

🚨 Termination Reason	📋 Description	🔍 Trigger	✅ Solution	📖 Page
Caller’s Number Restricted	Caller ID length exceeds limit	SS_CALLERALLOWLENGTH exceeded	Adjust caller length parameter	247
Called Number Restricted	Callee number too long	Number length limit	Adjust called number length settings	247
Caller’s Number Prefix Restricted	Caller prefix not allowed	Gateway prefix filter	Update allowed prefixes in gateway	248
Called Number Prefix Restricted	Destination prefix blocked	Gateway prefix restriction	Check gateway prefix settings	248
Call Restriction	Call blocked by policy	Account authorization settings	Update account call authorization	248

🚨 Termination Reason	📋 Description	⚙️ Configuration	📖 Page
No-Answer Forwarding by Caller	Caller has no-answer forwarding	Phone Management → Call Forwarding	248
No-Answer Forwarding by Called	Called has no-answer forwarding	Called phone forwarding settings	248
Timed Forwarding	Time-based forwarding active	Time period forwarding config	248
On-Busy Forwarding	Called busy, forwarded	Busy forwarding config	248
Call Forwarding by Called	Unconditional forwarding	Forwarding unconditional setting	249
Forwarding Loop	Infinite forwarding loop	Forwarding chain creates loop	249
Do-Not-Disturb from Called	Called has DND enabled	DND setting on phone	249

🔴 Protocol and System Termination Reasons

🚨 Termination Reason	📋 Description	💡 Notes	📖 Page
Protocol Limit	Server cannot process protocol	Check protocol compatibility	249
Busy	Called number is busy	Normal termination	249
Forcible Hang-Up	Server terminated session	Admin action or system limit	249
Hang-Up by Caller	Caller ended normally	Normal termination	249
Hang-Up by Called	Called party ended call	Normal termination	249
Session Closed by Called	TCP closed without BYE	Network/endpoint issue	249
Session Closed by Caller	Caller TCP closed	Check caller network	249
Codec Mismatch	No common codec	Enable transcoding	249

📞 SIP Response Code to VOS3000 Mapping

Reference: VOS3000 2.1.9.07 Manual, Section 4.5.2 (Page 247-248)

When SIP responses are received from endpoints or gateways, VOS3000 maps these standard SIP codes to internal termination reasons. Understanding this mapping helps correlate SIP traces with CDR data. (VOS3000 Call End Reasons)

📊 SIP 4xx Client Error Mapping

📞 SIP Code	📋 SIP Name	🔄 VOS3000 Mapping	⚡ Typical Cause
400	Bad Request	Protocol Error	Malformed SIP message
401	Unauthorized	Auth Failed	Invalid credentials
403	Forbidden	Account Locked / IP Blocked	Access denied by policy
404	Not Found	Not Found	User/destination unknown
405	Method Not Allowed	Protocol Limit	SIP method rejected
406	Not Acceptable	Codec Mismatch	SDP negotiation failed
407	Proxy Auth Required	Auth Failed	Proxy authentication needed
408	Request Timeout	Response Timeout	No SIP response received
415	Unsupported Media	Codec Mismatch	Media format rejected
422	Session Interval Too Small	Session Timer Error	Session timer too short
480	Temporarily Unavailable	Unregistered / Not Online	Endpoint unavailable
484	Address Incomplete	Number Restricted	Incomplete number
486	Busy Here	Busy	User busy
487	Request Terminated	Cancelled	Call cancelled
488	Not Acceptable Here	Codec Mismatch	SDP negotiation failed

📊 SIP 5xx Server Error Mapping

📞 SIP Code	📋 SIP Name	🔄 VOS3000 Mapping	⚡ Typical Cause
500	Server Internal Error	Protocol Error	Remote server error
502	Bad Gateway	Gateway Error	Invalid response from upstream
503	Service Unavailable	NoAvailableRouter	Server overloaded/maintenance
504	Server Time-out	Connection Timeout	No response from upstream

📞 H.323 Cause Codes Complete Reference

Reference: VOS3000 2.1.9.07 Manual, Section 4.5.3 (Page 248-249)

For H.323 protocol calls, VOS3000 uses ITU-T Q.931 cause codes. These standard cause codes provide detailed information about call failures in traditional telephony and H.323-based VoIP systems.

📊 H.323 Q.931 Cause Codes Table (VOS3000 Call End Reasons)

🔢 Code	📋 Name	📝 Meaning	🔄 VOS3000 Action
1	Unallocated Number	Number not assigned to any destination	Record as Not Found
2	No Route to Transit Net	No route through transit network	Record as NoAvailableRouter
3	No Route to Destination	No route to called number	Record as NoAvailableRouter
6	Channel Unacceptable	Channel not acceptable for call	Record as Connection Limit
7	Call Awarded	Call awarded, delivered to endpoint	Normal call handling
8	Preemption	Call preempted by higher priority	Record as Forcible Hang-Up
16	Normal Call Clearing	Call cleared normally	Record as Hang-Up by Caller/Called
17	User Busy	User is busy	Record as Busy
18	No User Responding	No response from user	Record as Response Timeout
19	No Answer from User	User alerted but no answer	Record as Response Timeout
20	Subscriber Absent	Subscriber not available	Record as Unregistered
21	Call Rejected	Call was rejected	Record as call rejection
22	Number Changed	Number has been changed	Record as Not Found
26	Non-Selected User Clearing	User not selected for call	Normal termination
27	Destination Out of Order	Destination cannot be reached	Record as Gateway Error
28	Invalid Number Format	Number format invalid	Record as Number Restricted
29	Facility Rejected	Facility rejected	Record as Protocol Error
30	Response to STATUS ENQUIRY	Response to status inquiry	Status response
31	Normal, Unspecified	Normal event, no specific cause	Normal termination
34	No Circuit Available	No channel available	Record as Connection Limit
38	Network Out of Order	Network not functioning	Record as Gateway Error
41	Temporary Failure	Temporary network problem	Record as temporary error
42	Switch Congestion	Network congestion	Record as Connection Limit
44	Requested Circuit Not Available	Requested circuit unavailable	Record as Connection Limit
47	Resource Unavailable	Insufficient resources	Record as Connection Limit
49	QoS Not Available	Requested QoS not available	Record as Protocol Error
50	Requested Facility Not Subscribed	Facility not subscribed	Record as Call Restriction
52	Outgoing Call Barred	Outgoing calls barred	Record as Call Restriction
54	Incoming Call Barred	Incoming calls barred	Record as Call Restriction
57	Bearer Capability Not Authorized	Capability not authorized	Record as Account Locked
58	Bearer Capability Not Available	Capability not available	Record as Codec Mismatch
63	Service Not Available	Service not available	Record as NoAvailableRouter
65	Bearer Capability Not Implemented	Capability not implemented	Record as Codec Mismatch
69	Requested Facility Not Implemented	Facility not implemented	Record as Protocol Limit
70	Only Restricted Digital Bearer	Only restricted digital available	Record as Codec Mismatch
79	Service Not Implemented	Service not implemented	Record as Protocol Limit
81	Invalid Call Reference	Call reference invalid	Record as Protocol Error
88	Incompatible Destination	Destination incompatible	Record as Codec Mismatch
95	Invalid Message	Message invalid	Record as Protocol Error
96	Mandatory IE Missing	Mandatory element missing	Record as Protocol Error
97	Message Not Implemented	Message type not implemented	Record as Protocol Limit
98	IE Not Implemented	Information element not implemented	Record as Protocol Limit
99	Invalid IE Contents	Information element invalid	Record as Protocol Error
100	Invalid Message for State	Message invalid for call state	Record as Protocol Error
101	Recovery on Timer Expiry	Timer expired	Record as Response Timeout
102	Protocol Error	Protocol error unspecified	Record as Protocol Error
111	Protocol Error, Unspecified	Unspecified protocol error	Record as Protocol Error

🔧 CDR Analysis and Diagnosis Flow

🔍 VOS3000 Call End Reasons Diagnosis Workflow

STEP 1: IDENTIFY THE PROBLEM
├── Open CDR Query (Data Query → CDR)
├── Filter by time period, account, or gateway
├── Look at "Termination Reason" column
└── Note patterns: same error repeatedly?

STEP 2: CLASSIFY ERROR TYPE
├── Account Issue?
│   ├── Account Locked → Account Management
│   ├── Insufficient Balance → Balance Management
│   └── Account Expired → Extend Expiry Date
│
├── Routing Issue?
│   ├── NoAvailableRouter → Add Gateway
│   ├── Not Found → Check Prefix Config
│   └── No Matching Rate → Add Rate Entry
│
├── Network Issue?
│   ├── Connection Timeout → Firewall/Connectivity
│   ├── Response Timeout → Gateway Response
│   └── Session Timeout → NAT/Session Timer
│
└── Protocol Issue?
    ├── Codec Mismatch → Enable Transcoding
    ├── Protocol Limit → Check Compatibility
    └── Protocol Error → Debug Trace Analysis

STEP 3: ANALYZE CALL TRACE
├── Find problematic call in CDR
├── Right-click → Call Analysis
├── Review SIP/H.323 message sequence
└── Identify exact point of failure

STEP 4: IMPLEMENT SOLUTION
├── Apply fix based on diagnosis
├── Document changes made
├── Test with sample calls
└── Verify in CDR that issue resolved

STEP 5: MONITOR
├── Check ASR improvement
├── Monitor for recurrence
└── Adjust configuration as needed

💰 VOS3000 Support Services

Need professional assistance with VOS3000 call failure diagnosis? Our team provides comprehensive VOS3000 support including CDR analysis, error code troubleshooting, and system optimization.

📦 Service	📝 Description	💼 Scope
CDR Analysis	Deep dive into call failure patterns	Error patterns, ASR/ACD analysis
Configuration Audit	Review VOS3000 settings	Parameters, gateway, routing
Technical Support	24/7 remote assistance	Troubleshooting, optimization

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📖 VOS3000 SIP Call Flow Complete Guide
📖 VOS3000 ASR ACD Analysis
📖 VOS3000 Gateway Analysis Reports
📖 VOS3000 Account Management
📥 VOS3000 Downloads – Manual and Software

❓ Frequently Asked Questions

What is the difference between “Response Timeout” and “Connection Timeout”?

Response Timeout occurs when the called party does not answer within the configured alerting time (phone rings but nobody picks up). Connection Timeout occurs when VOS3000 sends SIP INVITE but receives no SIP response at all after multiple retries, typically indicating network connectivity issues, firewall blocks, or the gateway being offline.

Why do I see different error codes for similar failures?

VOS3000 records different termination reasons based on the exact point of failure and the protocol used. A SIP 404 Not Found from a gateway produces “Not Found” while a routing table miss produces “NoAvailableRouter”. The distinction helps pinpoint whether the issue is with routing configuration or the remote endpoint’s response.

How can I filter CDR to see only failed calls?

In CDR Query, you can filter by Session Time = 0 to see calls that never connected, or create custom queries against the database to filter by specific termination reasons. The vos3000_cdr MySQL table contains all termination information for advanced analysis.

What causes “Codec Mismatch” errors?

Codec Mismatch occurs when the caller and callee have no common audio codec. This typically happens when one side only supports G.711 (alaw/ulaw) and the other only supports G.729 without transcoding enabled. Enable transcoding in VOS3000 or configure compatible codecs on both endpoints.

How do I interpret H.323 cause codes in CDR?

H.323 cause codes follow ITU-T Q.931 standard. Common codes include 16 (normal call clearing), 17 (user busy), 18 (no response), 21 (call rejected), and 34 (no circuit available). Use the complete cause code table in this guide to interpret specific values in your CDR.

📞 Get Expert VOS3000 Troubleshooting Support

Need help diagnosing VOS3000 call failures or understanding error codes? Our VOS3000 experts provide comprehensive support for CDR analysis, error code interpretation, and system optimization.

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

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🌐 Website: www.vos3000.com
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VOS3000 Call Termination Reasons: Complete Troubleshooting Reference Guide

March 31, 2026March 31, 2026 king

VOS3000 Call Termination Reasons: Complete Troubleshooting Reference Guide

Understanding VOS3000 call termination reasons is essential for maintaining a reliable VoIP operation. When calls fail or disconnect unexpectedly, the termination reason in the CDR (Call Detail Record) provides crucial information for diagnosis. This comprehensive reference guide covers all server-side termination reasons, client-side error codes, and provides actionable troubleshooting steps based on the official VOS3000 2.1.9.07 manual documentation.

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🔍 Understanding Call Termination in VOS3000

Every call processed through VOS3000 generates a CDR record that includes the termination reason. This information is captured at the “Termination Reason” or “Call End Reason” field and indicates why the call ended. Understanding these reasons helps identify patterns, troubleshoot recurring issues, and optimize call success rates.

📊 Where to Find Termination Information (VOS3000 Call Termination Reasons)

Navigation in VOS3000 Client:

1. Recent CDR
   Location: Data Query → Recent CDR
   Purpose: View recent call records with termination info

2. CDR Query
   Location: Data Query → CDR
   Purpose: Search historical CDR with filters

3. Call Analysis
   Location: Operation Management → Business Analysis → Call Analysis
   Purpose: Deep dive into specific call signaling

Key CDR Fields for Diagnosis:
┌──────────────────────────────────────────────────────────────┐
│ Field                │ Information Provided                │
├──────────────────────────────────────────────────────────────┤
│ Termination Reason   │ Why the call ended (primary field)  │
│ Session Time         │ How long call lasted                │
│ PDD                  │ Post dial delay                     │
│ Caller/Callee IP     │ Endpoint addresses                  │
│ Codec                │ Audio encoding used                 │
│ Setup Time           │ When call started                   │
│ Connect Time         │ When call was answered              │
│ End Time             │ When call terminated                │
└──────────────────────────────────────────────────────────────┘

📋 Server-Side Termination Reasons (VOS3000 Call Termination Reasons)

Server-side termination reasons are generated by VOS3000 itself when the softswitch decides to end or reject a call. These reasons indicate specific conditions that prevented call completion. (VOS3000 Call Termination Reasons)

Termination Reason	Description	Solution
Account Locked	The account is currently disabled or locked	Check Account Management → unlock account
Account Disabled	Account status is disabled	Enable account in Account Management
Account Expired	Account validity period has ended	Extend expiry date or add payment
Insufficient Balance	Account balance too low for call	Add credit to account
No Matching Account	No account found to bill the call	Create account or fix caller ID mapping

Termination Reason	Description	Solution
No Matching Rate	No rate found for the destination prefix	Add rate entry for the destination
The Called Not Online	No appropriate device/gateway to accept call	Check gateway status, add routing gateway
Connection Limit Exceeded	Maximum concurrent calls reached	Increase line limit on account/gateway
Unregistered	Terminal not registered and call not allowed	Check registration, verify device config

Termination Reason	Description	Related Parameter
Response Timeout	Called party did not answer before timeout	SS_TIMEOUT_PHONE_HANGUP, Alerting timer
Connection Timeout	No SIP response after max retries	SS_SIP_RESEND_INTERVAL, SS_SIP_SEND_RETRY
Proceeding Timeout	No response within proceeding time limit	Setup/Callproceeding timer in gateway
Session Timeout	SIP Timer update not received in time	SS_SIP_SESSION_TTL, SS_SIP_NO_TIMER_REINVITE_INTERVAL
Connection Establishment Timeout	Connection not established in time	Mapping gateway proceeding timeout

🔴 Number Restriction Termination Reasons

Termination Reason	Description	Solution
Caller’s Number Restricted	Caller ID length exceeds allowed limit	Check SS_CALLERALLOWLENGTH setting
Called Number Restricted	Callee number length exceeds limit	Adjust number length settings
Caller’s Number Prefix Restricted	Caller ID prefix not accepted by gateway	Update allowed prefixes in gateway
Called Number Prefix Restricted	Destination prefix not accepted	Check gateway prefix settings
Call Restriction	Call blocked by restrictions (e.g., International)	Update account authorization settings

Termination Reason	Description	Configuration
No-Answer Forwarding by Caller	Caller has no-answer forwarding enabled	Phone Management → Call Forwarding
No-Answer Forwarding by Called	Called party has no-answer forwarding	Called phone’s forwarding settings
Timed Forwarding	Call matches time-based forwarding	Time period forwarding config
On-Busy Forwarding	Called party busy, forwarded	Busy forwarding config
Call Forwarding by Called	Unconditional forwarding active	Forwarding unconditional setting
Forwarding Loop	Forwarding creates infinite loop	Fix forwarding configuration
Do-Not-Disturb from Called	Called has DND enabled	Disable DND or handle in routing

🔴 Protocol and System Termination Reasons (VOS3000 Call Termination Reasons)

Termination Reason	Description	Solution
Protocol Limit	Server cannot process this protocol type	Check protocol compatibility settings
Busy	Called number is busy	Normal termination, may retry later
Forcible Hang-Up	Server disconnected session	Check admin actions, system limits
Hang-Up by Caller	Caller ended the call normally	Normal termination
Hang-Up by Called	Called party ended the call	Normal termination
Session Closed by Called	Called closed TCP without hang-up signal	Check network/endpoint stability
Session Closed by Caller	Caller closed TCP without hang-up	Check caller network/device

📋 H.323 Device Error Codes (VOS3000 Call Termination Reasons)

When calls involve H.323 protocol, termination reasons may include standard H.323 cause codes. These codes follow ITU-T Q.931 recommendations and provide detailed information about call failures.

📊 Common H.323 Cause Codes (VOS3000 Call Termination Reasons)

Cause Code	Name	Meaning
1	UnallocatedNumber	Number not assigned to any destination
3	NoRouteToDestination	No route to the called number
6	ChannelUnacceptable	Channel not acceptable for this call
16	NormalCallClearing	Call cleared normally
17	UserBusy	User is busy
18	NoResponse	No response from user
19	NoAnswer	User alerted but did not answer
21	CallRejected	Call was rejected
27	DestinationOutOfOrder	Destination cannot be reached
28	InvalidNumberFormat	Number format invalid
34	NoCircuitChannelAvailable	No channel available
38	NetworkOutOfOrder	Network not functioning properly
41	TemporaryFailure	Temporary network problem
42	Congestion	Network congestion
44	RequestedCircuitNotAvailable	Requested circuit not available
47	ResourceUnavailable	Insufficient resources
49	QoSNotAvailable	Requested QoS not available

📋 SIP Error Codes Reference

SIP responses follow standard HTTP-style status codes. Understanding these codes helps diagnose problems when they appear in CDR records or Call Analysis.

📊 SIP 4xx Client Error Codes (VOS3000 Call Termination Reasons)

Code	Name	Meaning
400	Bad Request	Malformed SIP message
401	Unauthorized	Authentication required
403	Forbidden	Request understood but refused
404	Not Found	User not found
405	Method Not Allowed	SIP method not allowed
406	Not Acceptable	Cannot produce acceptable response
407	Proxy Authentication Required	Proxy authentication needed
408	Request Timeout	Server could not respond timely
410	Gone	Resource no longer exists
415	Unsupported Media Type	Media format not supported
422	Session Interval Too Small	Session timer too short
423	Interval Too Brief	Registration interval too short
480	Temporarily Unavailable	Callee temporarily unavailable
481	Call Leg/Transaction Does Not Exist	Matching transaction not found
482	Loop Detected	SIP loop detected
483	Too Many Hops	Max-Forwards exceeded
484	Address Incomplete	Number incomplete
485	Ambiguous	Ambiguous destination
486	Busy Here	Callee is busy
487	Request Terminated	Request cancelled
488	Not Acceptable Here	SDP not acceptable
491	Request Pending	Request pending for same call
493	Undecipherable	Cannot decrypt request

📊 SIP 5xx Server Error Codes

Code	Name	Meaning
500	Server Internal Error	Unexpected server error
501	Not Implemented	Function not implemented
502	Bad Gateway	Invalid response from upstream
503	Service Unavailable	Service temporarily unavailable
504	Server Time-out	No response from upstream
505	Version Not Supported	SIP version not supported
513	Message Too Large	Message exceeds size limit

📊 SIP 6xx Global Failure Codes

Code	Name	Meaning
600	Busy Everywhere	All destinations busy
603	Decline	Call declined everywhere
604	Does Not Exist Anywhere	User does not exist
606	Not Acceptable	Session cannot be established

🔧 Using Call Analysis for Troubleshooting

VOS3000 provides detailed call analysis tools that show the complete SIP/H.323 signaling flow, making it easier to diagnose complex problems.

⚙️ Call Analysis Tool Usage

Enabling Call Tracing:

1. Go to System → Debug Trace
2. Enable tracing (check "On")
3. Set trace length (default: 10 minutes)

Using Call Analysis:

1. Navigation → Data Query → CDR
2. Find the problematic call
3. Right-click → Call Analysis
4. View signaling flow:

Call Analysis Information:
┌──────────────────────────────────────────────────────────────┐
│ Column              │ Information                          │
├──────────────────────────────────────────────────────────────┤
│ Serial Number       │ Order of SIP messages                │
│ Caller Signaling    │ SIP messages from/to caller          │
│ Callee Signaling    │ SIP messages from/to callee          │
│ Memo                │ VOS3000 internal processing notes    │
│ Time                │ Timestamp of each message            │
└──────────────────────────────────────────────────────────────┘

Export Options:
- Export: Save signaling as file
- Import: Load saved file for analysis

This helps identify:
- Where in call flow the failure occurred
- What SIP response code was returned
- Which side initiated termination
- Authentication challenges
- SDP negotiation issues

📊 CDR Analysis for Pattern Detection

Regular CDR analysis helps identify recurring issues before they become major problems.

⚙️ Key Metrics to Monitor

CDR Analysis Dashboard (Recommended):

1. ASR (Answer Seizure Ratio)
   - Calculate per gateway, destination, account
   - Alert threshold: Below 40%
   - Indicates: Routing issues, capacity problems

2. ACD (Average Call Duration)
   - Monitor for unusual patterns
   - Very low ACD: Audio problems, wrong routes
   - Very high ACD: Possible fraud

3. PDD (Post Dial Delay)
   - High PDD indicates routing issues
   - Alert threshold: Above 5 seconds

4. Termination Reason Distribution
   - Track % of each termination reason
   - Sudden changes indicate new problems

Sample Analysis SQL (for database queries):

SELECT 
    termination_reason,
    COUNT(*) as count,
    (COUNT(*) * 100.0 / (SELECT COUNT(*) FROM cdr_table)) as percentage
FROM cdr_table
WHERE start_time >= DATE_SUB(NOW(), INTERVAL 24 HOUR)
GROUP BY termination_reason
ORDER BY count DESC;

📖 VOS3000 Easy Troubleshooting Guide
📖 VOS3000 FAQ Based on Official Manual
📖 How to Stop Illegal Calls in VOS3000
📖 VOS3000 Security and Hacking Prevention
📖 VOS3000 Downloads

❓ Frequently Asked Questions

What is the most common call termination reason?

The most common reasons are “Hang-Up by Caller” and “Hang-Up by Called” which are normal terminations. For abnormal terminations, “Response Timeout” and “Connection Timeout” are most frequent, usually caused by network issues, firewall problems, or endpoint misconfiguration.

How do I differentiate between timeout types?

Response Timeout occurs when the called party doesn’t answer (no 180 Ringing or 200 OK). Connection Timeout occurs when SIP messages don’t receive any response after retries. Proceeding Timeout occurs during call setup when 100 Trying is received but no further progress. Session Timeout happens during an established call when session timer updates fail.

Why do I see “Insufficient Balance” for accounts with credit?

This can occur when: the account has credit but the rate for the destination is higher than the balance, there’s a minimum balance requirement configured, or the account’s overdraft limit has been reached. Check rate tables and account settings in Account Management.

What causes “No Matching Rate” errors?

This occurs when a call is made to a destination prefix that doesn’t have a corresponding entry in the rate table. Check that rate prefixes cover all destination patterns. Remember that VOS3000 uses longest prefix matching, so ensure appropriate prefix entries exist.

How do I troubleshoot intermittent “Session Timeout” errors?

Session Timeout typically indicates NAT binding expiry or SIP Timer issues. Check NAT keep-alive settings (SS_SIP_NAT_KEEP_ALIVE_PERIOD), verify session timer configuration (SS_SIP_SESSION_TTL), and ensure the client supports SIP Session Timers. If the client doesn’t support timers, check SS_SIP_NO_TIMER_REINVITE_INTERVAL for the maximum call duration.

📞 Get Expert Help with VOS3000 Troubleshooting

Need assistance diagnosing call failures or optimizing your VOS3000 performance? Our team provides comprehensive VOS3000 support, CDR analysis, and troubleshooting services.

📱 WhatsApp: +8801911119966

📞 Need Professional VOS3000 Setup Support?

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

📱 WhatsApp: +8801911119966
🌐 Website: www.vos3000.com
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VOS3000 Call End Reasons: Complete Error Code Reference Guide

Table of Contents

🔍 Understanding VOS3000 Call End Reasons

📊 Where to Find VOS3000 Call End Reasons

📋 Complete VOS3000 Server-Side Termination Reasons

🔴 Account-Related Termination Reasons

🔴 Routing-Related Termination Reasons (VOS3000 Call End Reasons)

🔴 Timeout-Related Termination Reasons

🔴 Number Restriction Termination Reasons

🔴 Forwarding-Related Termination Reasons

🔴 Protocol and System Termination Reasons

📞 SIP Response Code to VOS3000 Mapping

📊 SIP 4xx Client Error Mapping

📊 SIP 5xx Server Error Mapping

📞 H.323 Cause Codes Complete Reference

📊 H.323 Q.931 Cause Codes Table (VOS3000 Call End Reasons)

🔧 CDR Analysis and Diagnosis Flow

🔍 VOS3000 Call End Reasons Diagnosis Workflow

💰 VOS3000 Support Services

🔗 Related Resources (VOS3000 Call End Reasons)

❓ Frequently Asked Questions

What is the difference between “Response Timeout” and “Connection Timeout”?

Why do I see different error codes for similar failures?

How can I filter CDR to see only failed calls?

What causes “Codec Mismatch” errors?

How do I interpret H.323 cause codes in CDR?

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VOS3000 Call Termination Reasons: Complete Troubleshooting Reference Guide

Table of Contents

🔍 Understanding Call Termination in VOS3000

📊 Where to Find Termination Information (VOS3000 Call Termination Reasons)

📋 Server-Side Termination Reasons (VOS3000 Call Termination Reasons)

🔴 Account-Related Termination Reasons (VOS3000 Call Termination Reasons)

🔴 Routing-Related Termination Reasons

🔴 Timeout-Related Termination Reasons

🔴 Number Restriction Termination Reasons

🔴 Forwarding-Related Termination Reasons (VOS3000 Call Termination Reasons)

🔴 Protocol and System Termination Reasons (VOS3000 Call Termination Reasons)

📋 H.323 Device Error Codes (VOS3000 Call Termination Reasons)

📊 Common H.323 Cause Codes (VOS3000 Call Termination Reasons)

📋 SIP Error Codes Reference

📊 SIP 4xx Client Error Codes (VOS3000 Call Termination Reasons)

📊 SIP 5xx Server Error Codes

📊 SIP 6xx Global Failure Codes

🔧 Using Call Analysis for Troubleshooting

⚙️ Call Analysis Tool Usage

📊 CDR Analysis for Pattern Detection

⚙️ Key Metrics to Monitor

🔗 Related Resources (VOS3000 Call Termination Reasons)

❓ Frequently Asked Questions

What is the most common call termination reason?

How do I differentiate between timeout types?

Why do I see “Insufficient Balance” for accounts with credit?

What causes “No Matching Rate” errors?

How do I troubleshoot intermittent “Session Timeout” errors?

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📞 Need Professional VOS3000 Setup Support?