{"id":2391,"date":"2026-03-31T19:38:39","date_gmt":"2026-03-31T19:38:39","guid":{"rendered":"https:\/\/multahost.com\/blog\/?p=2391"},"modified":"2026-03-31T19:53:27","modified_gmt":"2026-03-31T19:53:27","slug":"vos3000-call-termination-reasons","status":"publish","type":"post","link":"https:\/\/multahost.com\/blog\/vos3000-call-termination-reasons\/","title":{"rendered":"VOS3000 Call Termination Reasons: Complete Troubleshooting Reference Guide"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\" id=\"vos-3000-call-termination-reasons-complete-troubleshooting-reference-guide\">VOS3000 Call Termination Reasons: Complete Troubleshooting Reference Guide<\/h1>\n\n\n\n<p><strong>Understanding VOS3000 call termination reasons is essential for maintaining a reliable VoIP operation.<\/strong> 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.<\/p>\n\n\n\n<p>\ud83d\udcde <strong>Need help troubleshooting VOS3000 call failures?<\/strong> WhatsApp: <a href=\"https:\/\/wa.me\/8801911119966\" target=\"_blank\" rel=\"noreferrer noopener\">+8801911119966<\/a><\/p>\n\n\n\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>Table of Contents<\/h2><nav><ul><li><a href=\"#vos-3000-call-termination-reasons-complete-troubleshooting-reference-guide\">VOS3000 Call Termination Reasons: Complete Troubleshooting Reference Guide<\/a><ul><li><a href=\"#\ud83d\udd0d-understanding-call-termination-in-vos-3000\">\ud83d\udd0d Understanding Call Termination in VOS3000<\/a><ul><li><a href=\"#\ud83d\udcca-where-to-find-termination-information\">\ud83d\udcca Where to Find Termination Information (VOS3000 Call Termination Reasons)<\/a><\/li><\/ul><\/li><li><a href=\"#\ud83d\udccb-server-side-termination-reasons\">\ud83d\udccb Server-Side Termination Reasons (VOS3000 Call Termination Reasons)<\/a><ul><li><a href=\"#\ud83d\udd34-account-related-termination-reasons\">\ud83d\udd34 Account-Related Termination Reasons (VOS3000 Call Termination Reasons)<\/a><\/li><li><a href=\"#\ud83d\udd34-routing-related-termination-reasons\">\ud83d\udd34 Routing-Related Termination Reasons<\/a><\/li><li><a href=\"#\ud83d\udd34-timeout-related-termination-reasons\">\ud83d\udd34 Timeout-Related Termination Reasons<\/a><\/li><li><a href=\"#\ud83d\udd34-number-restriction-termination-reasons\">\ud83d\udd34 Number Restriction Termination Reasons<\/a><\/li><li><a href=\"#\ud83d\udd34-forwarding-related-termination-reasons\">\ud83d\udd34 Forwarding-Related Termination Reasons (VOS3000 Call Termination Reasons)<\/a><\/li><li><a href=\"#\ud83d\udd34-protocol-and-system-termination-reasons\">\ud83d\udd34 Protocol and System Termination Reasons (VOS3000 Call Termination Reasons)<\/a><\/li><\/ul><\/li><li><a href=\"#\ud83d\udccb-h-323-device-error-codes\">\ud83d\udccb H.323 Device Error Codes (VOS3000 Call Termination Reasons)<\/a><ul><li><a href=\"#\ud83d\udcca-common-h-323-cause-codes\">\ud83d\udcca Common H.323 Cause Codes (VOS3000 Call Termination Reasons)<\/a><\/li><\/ul><\/li><li><a href=\"#\ud83d\udccb-sip-error-codes-reference\">\ud83d\udccb SIP Error Codes Reference<\/a><ul><li><a href=\"#\ud83d\udcca-sip-4-xx-client-error-codes\">\ud83d\udcca SIP 4xx Client Error Codes (VOS3000 Call Termination Reasons)<\/a><\/li><li><a href=\"#\ud83d\udcca-sip-5-xx-server-error-codes\">\ud83d\udcca SIP 5xx Server Error Codes<\/a><\/li><li><a href=\"#\ud83d\udcca-sip-6-xx-global-failure-codes\">\ud83d\udcca SIP 6xx Global Failure Codes<\/a><\/li><\/ul><\/li><li><a href=\"#\ud83d\udd27-using-call-analysis-for-troubleshooting\">\ud83d\udd27 Using Call Analysis for Troubleshooting<\/a><ul><li><a href=\"#\u2699\ufe0f-call-analysis-tool-usage\">\u2699\ufe0f Call Analysis Tool Usage<\/a><\/li><\/ul><\/li><li><a href=\"#\ud83d\udcca-cdr-analysis-for-pattern-detection\">\ud83d\udcca CDR Analysis for Pattern Detection<\/a><ul><li><a href=\"#\u2699\ufe0f-key-metrics-to-monitor\">\u2699\ufe0f Key Metrics to Monitor<\/a><\/li><\/ul><\/li><li><a href=\"#\ud83d\udd17-related-resources\">\ud83d\udd17 Related Resources (VOS3000 Call Termination Reasons)<\/a><\/li><li><a href=\"#\u2753-frequently-asked-questions\">\u2753 Frequently Asked Questions<\/a><ul><li><a href=\"#what-is-the-most-common-call-termination-reason\">What is the most common call termination reason?<\/a><\/li><li><a href=\"#how-do-i-differentiate-between-timeout-types\">How do I differentiate between timeout types?<\/a><\/li><li><a href=\"#why-do-i-see-insufficient-balance-for-accounts-with-credit\">Why do I see &#8220;Insufficient Balance&#8221; for accounts with credit?<\/a><\/li><li><a href=\"#what-causes-no-matching-rate-errors\">What causes &#8220;No Matching Rate&#8221; errors?<\/a><\/li><li><a href=\"#how-do-i-troubleshoot-intermittent-session-timeout-errors\">How do I troubleshoot intermittent &#8220;Session Timeout&#8221; errors?<\/a><\/li><\/ul><\/li><li><a href=\"#\ud83d\udcde-get-expert-help-with-vos-3000-troubleshooting\">\ud83d\udcde Get Expert Help with VOS3000 Troubleshooting<\/a><\/li><li><a href=\"#\ud83d\udcde-need-call-center-setup-support\">\ud83d\udcde Need Professional VOS3000 Setup Support?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\ud83d\udd0d-understanding-call-termination-in-vos-3000\">\ud83d\udd0d Understanding Call Termination in VOS3000<\/h2>\n\n\n\n<p>Every call processed through VOS3000 generates a CDR record that includes the termination reason. This information is captured at the &#8220;Termination Reason&#8221; or &#8220;Call End Reason&#8221; field and indicates why the call ended. Understanding these reasons helps identify patterns, troubleshoot recurring issues, and optimize call success rates.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\ud83d\udcca-where-to-find-termination-information\">\ud83d\udcca Where to Find Termination Information (VOS3000 Call Termination Reasons)<\/h3>\n\n\n\n<pre class=\"wp-block-preformatted\">Navigation in VOS3000 Client:\n\n1. Recent CDR\n   Location: Data Query \u2192 Recent CDR\n   Purpose: View recent call records with termination info\n\n2. CDR Query\n   Location: Data Query \u2192 CDR\n   Purpose: Search historical CDR with filters\n\n3. Call Analysis\n   Location: Operation Management \u2192 Business Analysis \u2192 Call Analysis\n   Purpose: Deep dive into specific call signaling\n\nKey CDR Fields for Diagnosis:\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 Field                \u2502 Information Provided                \u2502\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524\n\u2502 Termination Reason   \u2502 Why the call ended (primary field)  \u2502\n\u2502 Session Time         \u2502 How long call lasted                \u2502\n\u2502 PDD                  \u2502 Post dial delay                     \u2502\n\u2502 Caller\/Callee IP     \u2502 Endpoint addresses                  \u2502\n\u2502 Codec                \u2502 Audio encoding used                 \u2502\n\u2502 Setup Time           \u2502 When call started                   \u2502\n\u2502 Connect Time         \u2502 When call was answered              \u2502\n\u2502 End Time             \u2502 When call terminated                \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\ud83d\udccb-server-side-termination-reasons\">\ud83d\udccb Server-Side Termination Reasons (VOS3000 Call Termination Reasons)<\/h2>\n\n\n\n<p>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)<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\ud83d\udd34-account-related-termination-reasons\">\ud83d\udd34 Account-Related Termination Reasons (VOS3000 Call Termination Reasons)<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Termination Reason<\/th><th class=\"has-text-align-left\" data-align=\"left\">Description<\/th><th class=\"has-text-align-left\" data-align=\"left\">Solution<\/th><\/tr><\/thead><tbody><tr><td><strong>Account Locked<\/strong><\/td><td>The account is currently disabled or locked<\/td><td>Check Account Management \u2192 unlock account<\/td><\/tr><tr><td><strong>Account Disabled<\/strong><\/td><td>Account status is disabled<\/td><td>Enable account in Account Management<\/td><\/tr><tr><td><strong>Account Expired<\/strong><\/td><td>Account validity period has ended<\/td><td>Extend expiry date or add payment<\/td><\/tr><tr><td><strong>Insufficient Balance<\/strong><\/td><td>Account balance too low for call<\/td><td>Add credit to account<\/td><\/tr><tr><td><strong>No Matching Account<\/strong><\/td><td>No account found to bill the call<\/td><td>Create account or fix caller ID mapping<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\ud83d\udd34-routing-related-termination-reasons\">\ud83d\udd34 Routing-Related Termination Reasons<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Termination Reason<\/th><th class=\"has-text-align-left\" data-align=\"left\">Description<\/th><th class=\"has-text-align-left\" data-align=\"left\">Solution<\/th><\/tr><\/thead><tbody><tr><td><strong>No Matching Rate<\/strong><\/td><td>No rate found for the destination prefix<\/td><td>Add rate entry for the destination<\/td><\/tr><tr><td><strong>The Called Not Online<\/strong><\/td><td>No appropriate device\/gateway to accept call<\/td><td>Check gateway status, add routing gateway<\/td><\/tr><tr><td><strong>Connection Limit Exceeded<\/strong><\/td><td>Maximum concurrent calls reached<\/td><td>Increase line limit on account\/gateway<\/td><\/tr><tr><td><strong>Unregistered<\/strong><\/td><td>Terminal not registered and call not allowed<\/td><td>Check registration, verify device config<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\ud83d\udd34-timeout-related-termination-reasons\">\ud83d\udd34 Timeout-Related Termination Reasons<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Termination Reason<\/th><th class=\"has-text-align-left\" data-align=\"left\">Description<\/th><th class=\"has-text-align-left\" data-align=\"left\">Related Parameter<\/th><\/tr><\/thead><tbody><tr><td><strong>Response Timeout<\/strong><\/td><td>Called party did not answer before timeout<\/td><td>SS_TIMEOUT_PHONE_HANGUP, Alerting timer<\/td><\/tr><tr><td><strong>Connection Timeout<\/strong><\/td><td>No SIP response after max retries<\/td><td>SS_SIP_RESEND_INTERVAL, SS_SIP_SEND_RETRY<\/td><\/tr><tr><td><strong>Proceeding Timeout<\/strong><\/td><td>No response within proceeding time limit<\/td><td>Setup\/Callproceeding timer in gateway<\/td><\/tr><tr><td><strong>Session Timeout<\/strong><\/td><td>SIP Timer update not received in time<\/td><td>SS_SIP_SESSION_TTL, SS_SIP_NO_TIMER_REINVITE_INTERVAL<\/td><\/tr><tr><td><strong>Connection Establishment Timeout<\/strong><\/td><td>Connection not established in time<\/td><td>Mapping gateway proceeding timeout<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\ud83d\udd34-number-restriction-termination-reasons\">\ud83d\udd34 Number Restriction Termination Reasons<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Termination Reason<\/th><th class=\"has-text-align-left\" data-align=\"left\">Description<\/th><th class=\"has-text-align-left\" data-align=\"left\">Solution<\/th><\/tr><\/thead><tbody><tr><td><strong>Caller&#8217;s Number Restricted<\/strong><\/td><td>Caller ID length exceeds allowed limit<\/td><td>Check SS_CALLERALLOWLENGTH setting<\/td><\/tr><tr><td><strong>Called Number Restricted<\/strong><\/td><td>Callee number length exceeds limit<\/td><td>Adjust number length settings<\/td><\/tr><tr><td><strong>Caller&#8217;s Number Prefix Restricted<\/strong><\/td><td>Caller ID prefix not accepted by gateway<\/td><td>Update allowed prefixes in gateway<\/td><\/tr><tr><td><strong>Called Number Prefix Restricted<\/strong><\/td><td>Destination prefix not accepted<\/td><td>Check gateway prefix settings<\/td><\/tr><tr><td><strong>Call Restriction<\/strong><\/td><td>Call blocked by restrictions (e.g., International)<\/td><td>Update account authorization settings<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\ud83d\udd34-forwarding-related-termination-reasons\">\ud83d\udd34 Forwarding-Related Termination Reasons (VOS3000 Call Termination Reasons)<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Termination Reason<\/th><th class=\"has-text-align-left\" data-align=\"left\">Description<\/th><th class=\"has-text-align-left\" data-align=\"left\">Configuration<\/th><\/tr><\/thead><tbody><tr><td><strong>No-Answer Forwarding by Caller<\/strong><\/td><td>Caller has no-answer forwarding enabled<\/td><td>Phone Management \u2192 Call Forwarding<\/td><\/tr><tr><td><strong>No-Answer Forwarding by Called<\/strong><\/td><td>Called party has no-answer forwarding<\/td><td>Called phone&#8217;s forwarding settings<\/td><\/tr><tr><td><strong>Timed Forwarding<\/strong><\/td><td>Call matches time-based forwarding<\/td><td>Time period forwarding config<\/td><\/tr><tr><td><strong>On-Busy Forwarding<\/strong><\/td><td>Called party busy, forwarded<\/td><td>Busy forwarding config<\/td><\/tr><tr><td><strong>Call Forwarding by Called<\/strong><\/td><td>Unconditional forwarding active<\/td><td>Forwarding unconditional setting<\/td><\/tr><tr><td><strong>Forwarding Loop<\/strong><\/td><td>Forwarding creates infinite loop<\/td><td>Fix forwarding configuration<\/td><\/tr><tr><td><strong>Do-Not-Disturb from Called<\/strong><\/td><td>Called has DND enabled<\/td><td>Disable DND or handle in routing<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\ud83d\udd34-protocol-and-system-termination-reasons\">\ud83d\udd34 Protocol and System Termination Reasons (VOS3000 Call Termination Reasons)<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Termination Reason<\/th><th class=\"has-text-align-left\" data-align=\"left\">Description<\/th><th class=\"has-text-align-left\" data-align=\"left\">Solution<\/th><\/tr><\/thead><tbody><tr><td><strong>Protocol Limit<\/strong><\/td><td>Server cannot process this protocol type<\/td><td>Check protocol compatibility settings<\/td><\/tr><tr><td><strong>Busy<\/strong><\/td><td>Called number is busy<\/td><td>Normal termination, may retry later<\/td><\/tr><tr><td><strong>Forcible Hang-Up<\/strong><\/td><td>Server disconnected session<\/td><td>Check admin actions, system limits<\/td><\/tr><tr><td><strong>Hang-Up by Caller<\/strong><\/td><td>Caller ended the call normally<\/td><td>Normal termination<\/td><\/tr><tr><td><strong>Hang-Up by Called<\/strong><\/td><td>Called party ended the call<\/td><td>Normal termination<\/td><\/tr><tr><td><strong>Session Closed by Called<\/strong><\/td><td>Called closed TCP without hang-up signal<\/td><td>Check network\/endpoint stability<\/td><\/tr><tr><td><strong>Session Closed by Caller<\/strong><\/td><td>Caller closed TCP without hang-up<\/td><td>Check caller network\/device<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\ud83d\udccb-h-323-device-error-codes\">\ud83d\udccb H.323 Device Error Codes (VOS3000 Call Termination Reasons)<\/h2>\n\n\n\n<p>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.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\ud83d\udcca-common-h-323-cause-codes\">\ud83d\udcca Common H.323 Cause Codes (VOS3000 Call Termination Reasons)<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Cause Code<\/th><th class=\"has-text-align-left\" data-align=\"left\">Name<\/th><th class=\"has-text-align-left\" data-align=\"left\">Meaning<\/th><\/tr><\/thead><tbody><tr><td><strong>1<\/strong><\/td><td>UnallocatedNumber<\/td><td>Number not assigned to any destination<\/td><\/tr><tr><td><strong>3<\/strong><\/td><td>NoRouteToDestination<\/td><td>No route to the called number<\/td><\/tr><tr><td><strong>6<\/strong><\/td><td>ChannelUnacceptable<\/td><td>Channel not acceptable for this call<\/td><\/tr><tr><td><strong>16<\/strong><\/td><td>NormalCallClearing<\/td><td>Call cleared normally<\/td><\/tr><tr><td><strong>17<\/strong><\/td><td>UserBusy<\/td><td>User is busy<\/td><\/tr><tr><td><strong>18<\/strong><\/td><td>NoResponse<\/td><td>No response from user<\/td><\/tr><tr><td><strong>19<\/strong><\/td><td>NoAnswer<\/td><td>User alerted but did not answer<\/td><\/tr><tr><td><strong>21<\/strong><\/td><td>CallRejected<\/td><td>Call was rejected<\/td><\/tr><tr><td><strong>27<\/strong><\/td><td>DestinationOutOfOrder<\/td><td>Destination cannot be reached<\/td><\/tr><tr><td><strong>28<\/strong><\/td><td>InvalidNumberFormat<\/td><td>Number format invalid<\/td><\/tr><tr><td><strong>34<\/strong><\/td><td>NoCircuitChannelAvailable<\/td><td>No channel available<\/td><\/tr><tr><td><strong>38<\/strong><\/td><td>NetworkOutOfOrder<\/td><td>Network not functioning properly<\/td><\/tr><tr><td><strong>41<\/strong><\/td><td>TemporaryFailure<\/td><td>Temporary network problem<\/td><\/tr><tr><td><strong>42<\/strong><\/td><td>Congestion<\/td><td>Network congestion<\/td><\/tr><tr><td><strong>44<\/strong><\/td><td>RequestedCircuitNotAvailable<\/td><td>Requested circuit not available<\/td><\/tr><tr><td><strong>47<\/strong><\/td><td>ResourceUnavailable<\/td><td>Insufficient resources<\/td><\/tr><tr><td><strong>49<\/strong><\/td><td>QoSNotAvailable<\/td><td>Requested QoS not available<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\ud83d\udccb-sip-error-codes-reference\">\ud83d\udccb SIP Error Codes Reference<\/h2>\n\n\n\n<p>SIP responses follow standard HTTP-style status codes. Understanding these codes helps diagnose problems when they appear in CDR records or Call Analysis.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\ud83d\udcca-sip-4-xx-client-error-codes\">\ud83d\udcca SIP 4xx Client Error Codes (VOS3000 Call Termination Reasons)<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Code<\/th><th class=\"has-text-align-left\" data-align=\"left\">Name<\/th><th class=\"has-text-align-left\" data-align=\"left\">Meaning<\/th><\/tr><\/thead><tbody><tr><td><strong>400<\/strong><\/td><td>Bad Request<\/td><td>Malformed SIP message<\/td><\/tr><tr><td><strong>401<\/strong><\/td><td>Unauthorized<\/td><td>Authentication required<\/td><\/tr><tr><td><strong>403<\/strong><\/td><td>Forbidden<\/td><td>Request understood but refused<\/td><\/tr><tr><td><strong>404<\/strong><\/td><td>Not Found<\/td><td>User not found<\/td><\/tr><tr><td><strong>405<\/strong><\/td><td>Method Not Allowed<\/td><td>SIP method not allowed<\/td><\/tr><tr><td><strong>406<\/strong><\/td><td>Not Acceptable<\/td><td>Cannot produce acceptable response<\/td><\/tr><tr><td><strong>407<\/strong><\/td><td>Proxy Authentication Required<\/td><td>Proxy authentication needed<\/td><\/tr><tr><td><strong>408<\/strong><\/td><td>Request Timeout<\/td><td>Server could not respond timely<\/td><\/tr><tr><td><strong>410<\/strong><\/td><td>Gone<\/td><td>Resource no longer exists<\/td><\/tr><tr><td><strong>415<\/strong><\/td><td>Unsupported Media Type<\/td><td>Media format not supported<\/td><\/tr><tr><td><strong>422<\/strong><\/td><td>Session Interval Too Small<\/td><td>Session timer too short<\/td><\/tr><tr><td><strong>423<\/strong><\/td><td>Interval Too Brief<\/td><td>Registration interval too short<\/td><\/tr><tr><td><strong>480<\/strong><\/td><td>Temporarily Unavailable<\/td><td>Callee temporarily unavailable<\/td><\/tr><tr><td><strong>481<\/strong><\/td><td>Call Leg\/Transaction Does Not Exist<\/td><td>Matching transaction not found<\/td><\/tr><tr><td><strong>482<\/strong><\/td><td>Loop Detected<\/td><td>SIP loop detected<\/td><\/tr><tr><td><strong>483<\/strong><\/td><td>Too Many Hops<\/td><td>Max-Forwards exceeded<\/td><\/tr><tr><td><strong>484<\/strong><\/td><td>Address Incomplete<\/td><td>Number incomplete<\/td><\/tr><tr><td><strong>485<\/strong><\/td><td>Ambiguous<\/td><td>Ambiguous destination<\/td><\/tr><tr><td><strong>486<\/strong><\/td><td>Busy Here<\/td><td>Callee is busy<\/td><\/tr><tr><td><strong>487<\/strong><\/td><td>Request Terminated<\/td><td>Request cancelled<\/td><\/tr><tr><td><strong>488<\/strong><\/td><td>Not Acceptable Here<\/td><td>SDP not acceptable<\/td><\/tr><tr><td><strong>491<\/strong><\/td><td>Request Pending<\/td><td>Request pending for same call<\/td><\/tr><tr><td><strong>493<\/strong><\/td><td>Undecipherable<\/td><td>Cannot decrypt request<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\ud83d\udcca-sip-5-xx-server-error-codes\">\ud83d\udcca SIP 5xx Server Error Codes<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Code<\/th><th class=\"has-text-align-left\" data-align=\"left\">Name<\/th><th class=\"has-text-align-left\" data-align=\"left\">Meaning<\/th><\/tr><\/thead><tbody><tr><td><strong>500<\/strong><\/td><td>Server Internal Error<\/td><td>Unexpected server error<\/td><\/tr><tr><td><strong>501<\/strong><\/td><td>Not Implemented<\/td><td>Function not implemented<\/td><\/tr><tr><td><strong>502<\/strong><\/td><td>Bad Gateway<\/td><td>Invalid response from upstream<\/td><\/tr><tr><td><strong>503<\/strong><\/td><td>Service Unavailable<\/td><td>Service temporarily unavailable<\/td><\/tr><tr><td><strong>504<\/strong><\/td><td>Server Time-out<\/td><td>No response from upstream<\/td><\/tr><tr><td><strong>505<\/strong><\/td><td>Version Not Supported<\/td><td>SIP version not supported<\/td><\/tr><tr><td><strong>513<\/strong><\/td><td>Message Too Large<\/td><td>Message exceeds size limit<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\ud83d\udcca-sip-6-xx-global-failure-codes\">\ud83d\udcca SIP 6xx Global Failure Codes<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Code<\/th><th class=\"has-text-align-left\" data-align=\"left\">Name<\/th><th class=\"has-text-align-left\" data-align=\"left\">Meaning<\/th><\/tr><\/thead><tbody><tr><td><strong>600<\/strong><\/td><td>Busy Everywhere<\/td><td>All destinations busy<\/td><\/tr><tr><td><strong>603<\/strong><\/td><td>Decline<\/td><td>Call declined everywhere<\/td><\/tr><tr><td><strong>604<\/strong><\/td><td>Does Not Exist Anywhere<\/td><td>User does not exist<\/td><\/tr><tr><td><strong>606<\/strong><\/td><td>Not Acceptable<\/td><td>Session cannot be established<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\ud83d\udd27-using-call-analysis-for-troubleshooting\">\ud83d\udd27 Using Call Analysis for Troubleshooting<\/h2>\n\n\n\n<p>VOS3000 provides detailed call analysis tools that show the complete SIP\/H.323 signaling flow, making it easier to diagnose complex problems.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u2699\ufe0f-call-analysis-tool-usage\">\u2699\ufe0f Call Analysis Tool Usage<\/h3>\n\n\n\n<pre class=\"wp-block-preformatted\">Enabling Call Tracing:\n\n1. Go to System \u2192 Debug Trace\n2. Enable tracing (check \"On\")\n3. Set trace length (default: 10 minutes)\n\nUsing Call Analysis:\n\n1. Navigation \u2192 Data Query \u2192 CDR\n2. Find the problematic call\n3. Right-click \u2192 Call Analysis\n4. View signaling flow:\n\nCall Analysis Information:\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 Column              \u2502 Information                          \u2502\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524\n\u2502 Serial Number       \u2502 Order of SIP messages                \u2502\n\u2502 Caller Signaling    \u2502 SIP messages from\/to caller          \u2502\n\u2502 Callee Signaling    \u2502 SIP messages from\/to callee          \u2502\n\u2502 Memo                \u2502 VOS3000 internal processing notes    \u2502\n\u2502 Time                \u2502 Timestamp of each message            \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n\nExport Options:\n- Export: Save signaling as file\n- Import: Load saved file for analysis\n\nThis helps identify:\n- Where in call flow the failure occurred\n- What SIP response code was returned\n- Which side initiated termination\n- Authentication challenges\n- SDP negotiation issues\n<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\ud83d\udcca-cdr-analysis-for-pattern-detection\">\ud83d\udcca CDR Analysis for Pattern Detection<\/h2>\n\n\n\n<p>Regular CDR analysis helps identify recurring issues before they become major problems.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u2699\ufe0f-key-metrics-to-monitor\">\u2699\ufe0f Key Metrics to Monitor<\/h3>\n\n\n\n<pre class=\"wp-block-preformatted\">CDR Analysis Dashboard (Recommended):\n\n1. ASR (Answer Seizure Ratio)\n   - Calculate per gateway, destination, account\n   - Alert threshold: Below 40%\n   - Indicates: Routing issues, capacity problems\n\n2. ACD (Average Call Duration)\n   - Monitor for unusual patterns\n   - Very low ACD: Audio problems, wrong routes\n   - Very high ACD: Possible fraud\n\n3. PDD (Post Dial Delay)\n   - High PDD indicates routing issues\n   - Alert threshold: Above 5 seconds\n\n4. Termination Reason Distribution\n   - Track % of each termination reason\n   - Sudden changes indicate new problems\n\nSample Analysis SQL (for database queries):\n\nSELECT \n    termination_reason,\n    COUNT(*) as count,\n    (COUNT(*) * 100.0 \/ (SELECT COUNT(*) FROM cdr_table)) as percentage\nFROM cdr_table\nWHERE start_time &gt;= DATE_SUB(NOW(), INTERVAL 24 HOUR)\nGROUP BY termination_reason\nORDER BY count DESC;\n<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\ud83d\udd17-related-resources\">\ud83d\udd17 Related Resources (VOS3000 Call Termination Reasons)<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ud83d\udcd6 <a href=\"https:\/\/multahost.com\/blog\/faster-support-for-vos3000-easy-troubleshoot-for-problems\/\" target=\"_blank\" rel=\"noreferrer noopener\">VOS3000 Easy Troubleshooting Guide<\/a><\/li>\n\n\n\n<li>\ud83d\udcd6 <a href=\"https:\/\/multahost.com\/blog\/vos3000-softswitch-faq-based-on-official-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\">VOS3000 FAQ Based on Official Manual<\/a><\/li>\n\n\n\n<li>\ud83d\udcd6 <a href=\"https:\/\/multahost.com\/blog\/illegal-call-in-vos3000-server-how-to-stop-illegal-call-is-it-important\/\" target=\"_blank\" rel=\"noreferrer noopener\">How to Stop Illegal Calls in VOS3000<\/a><\/li>\n\n\n\n<li>\ud83d\udcd6 <a href=\"https:\/\/multahost.com\/blog\/how-vos3000-get-hacked-by-sql-injection-script-prevent-hacking\/\" target=\"_blank\" rel=\"noreferrer noopener\">VOS3000 Security and Hacking Prevention<\/a><\/li>\n\n\n\n<li>\ud83d\udcd6 <a href=\"https:\/\/vos3000.com\/downloads.php\" target=\"_blank\" rel=\"noreferrer noopener\">VOS3000 Downloads<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u2753-frequently-asked-questions\">\u2753 Frequently Asked Questions<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"what-is-the-most-common-call-termination-reason\">What is the most common call termination reason?<\/h3>\n\n\n\n<p>The most common reasons are &#8220;Hang-Up by Caller&#8221; and &#8220;Hang-Up by Called&#8221; which are normal terminations. For abnormal terminations, &#8220;Response Timeout&#8221; and &#8220;Connection Timeout&#8221; are most frequent, usually caused by network issues, firewall problems, or endpoint misconfiguration.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"how-do-i-differentiate-between-timeout-types\">How do I differentiate between timeout types?<\/h3>\n\n\n\n<p>Response Timeout occurs when the called party doesn&#8217;t answer (no 180 Ringing or 200 OK). Connection Timeout occurs when SIP messages don&#8217;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.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"why-do-i-see-insufficient-balance-for-accounts-with-credit\">Why do I see &#8220;Insufficient Balance&#8221; for accounts with credit?<\/h3>\n\n\n\n<p>This can occur when: the account has credit but the rate for the destination is higher than the balance, there&#8217;s a minimum balance requirement configured, or the account&#8217;s overdraft limit has been reached. Check rate tables and account settings in Account Management.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"what-causes-no-matching-rate-errors\">What causes &#8220;No Matching Rate&#8221; errors?<\/h3>\n\n\n\n<p>This occurs when a call is made to a destination prefix that doesn&#8217;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.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"how-do-i-troubleshoot-intermittent-session-timeout-errors\">How do I troubleshoot intermittent &#8220;Session Timeout&#8221; errors?<\/h3>\n\n\n\n<p>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&#8217;t support timers, check SS_SIP_NO_TIMER_REINVITE_INTERVAL for the maximum call duration.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\ud83d\udcde-get-expert-help-with-vos-3000-troubleshooting\">\ud83d\udcde Get Expert Help with VOS3000 Troubleshooting<\/h2>\n\n\n\n<p>Need assistance diagnosing call failures or optimizing your VOS3000 performance? Our team provides comprehensive VOS3000 support, CDR analysis, and troubleshooting services.<\/p>\n\n\n\n<p><strong>\ud83d\udcf1 WhatsApp: <a href=\"https:\/\/wa.me\/8801911119966\" target=\"_blank\" rel=\"noreferrer noopener\">+8801911119966<\/a><\/strong><\/p>\n\n\n\n<p>Contact us for VOS3000 installation, server hosting, and professional technical support!<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\ud83d\udcde-need-call-center-setup-support\">\ud83d\udcde Need Professional VOS3000 Setup Support?<\/h2>\n\n\n\n<p>For professional VOS3000 installations and deployment, VOS3000 Server Rental Solution:<\/p>\n\n\n\n<p>\ud83d\udcf1 <strong>WhatsApp:<\/strong> <a href=\"https:\/\/wa.me\/8801911119966\" target=\"_blank\" rel=\"noopener\">+8801911119966<\/a><br>\ud83c\udf10 <strong>Website:<\/strong> <a href=\"https:\/\/www.vos3000.com\" target=\"_blank\" rel=\"noopener\">www.vos3000.com<\/a><br>\ud83c\udf10 <strong>Blog:<\/strong> <a href=\"https:\/\/multahost.com\/blog\">multahost.com\/blog<\/a><br>\ud83d\udce5 <strong>Downloads:<\/strong> <a href=\"https:\/\/www.vos3000.com\/downloads.php\" target=\"_blank\" rel=\"noopener\">VOS3000 Downloads<\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><img data-recalc-dims=\"1\" height=\"540\" width=\"809\" decoding=\"async\" style=\"\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" alt=\"VOS3000 softswitch VoIP, VOS3000 seguridad, VOS3000 Call Center Soluciones, VOS3000 API Integraci\u00f3n, VOS3000 Infraestructura, VOS3000 Errores Ruting Llamadas, VOS3000\u9519\u8bef\u4ee3\u7801\u66ff\u6362\u4e0e\u547c\u53eb\u5931\u8d25\u6392\u67e5, VOS3000 Optimizaci\u00f3n de Rendimiento, VOS3000 C\u00f3digos Error Terminaci\u00f3n, VOS3000 NoAvailableRouter\u9519\u8bef\u89e3\u51b3\u65b9\u6848, Negocio VoIP Mayorista, VICIDIAL Servidor, Softswitch Barato, VoIP\u6279\u53d1\u4e1a\u52a1, \u8f6f\u4ea4\u6362\u6bd4\u8f83, Advance Routing, VOS3000 Troubleshooting Guide, VOS3000 CDR Analysis, Gu\u00eda Completa VOS3000 2026, VOS3000 \u6307\u5357 2026, SIP ALG Problems, VOS3000 gateway configuration, VoIP Fraud Prevention, VOS3000 Media Proxy, VOS3000 Call Termination Reasons\" title=\"\" class=\"lazyload\" data-src=\"https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/03\/vos3000-spanish-banner-server-callcenter-api-1024x683.png?resize=809%2C540&#038;ssl=1\"><\/td><td><img data-recalc-dims=\"1\" height=\"540\" width=\"809\" decoding=\"async\" style=\"\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" alt=\"VOS3000 softswitch VoIP, VOS3000 seguridad, VOS3000 Call Center Soluciones, VOS3000 API Integraci\u00f3n, VOS3000 Infraestructura, VOS3000 Errores Ruting Llamadas, VOS3000\u9519\u8bef\u4ee3\u7801\u66ff\u6362\u4e0e\u547c\u53eb\u5931\u8d25\u6392\u67e5, VOS3000 Optimizaci\u00f3n de Rendimiento, VOS3000 C\u00f3digos Error Terminaci\u00f3n, VOS3000 NoAvailableRouter\u9519\u8bef\u89e3\u51b3\u65b9\u6848, Negocio VoIP Mayorista, VICIDIAL Servidor, Softswitch Barato, VoIP\u6279\u53d1\u4e1a\u52a1, \u8f6f\u4ea4\u6362\u6bd4\u8f83, Advance Routing, VOS3000 Troubleshooting Guide, VOS3000 CDR Analysis, Gu\u00eda Completa VOS3000 2026, VOS3000 \u6307\u5357 2026, SIP ALG Problems, VOS3000 gateway configuration, VoIP Fraud Prevention, VOS3000 Media Proxy, VOS3000 Call Termination Reasons\" title=\"\" class=\"lazyload\" data-src=\"https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/03\/vos3000-spanish-banner-server-callcenter-api-1024x683.png?resize=809%2C540&#038;ssl=1\"><\/td><td><img data-recalc-dims=\"1\" height=\"540\" width=\"809\" decoding=\"async\" style=\"\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" alt=\"VOS3000 softswitch VoIP, VOS3000 seguridad, VOS3000 Call Center Soluciones, VOS3000 API Integraci\u00f3n, VOS3000 Infraestructura, VOS3000 Errores Ruting Llamadas, VOS3000\u9519\u8bef\u4ee3\u7801\u66ff\u6362\u4e0e\u547c\u53eb\u5931\u8d25\u6392\u67e5, VOS3000 Optimizaci\u00f3n de Rendimiento, VOS3000 C\u00f3digos Error Terminaci\u00f3n, VOS3000 NoAvailableRouter\u9519\u8bef\u89e3\u51b3\u65b9\u6848, Negocio VoIP Mayorista, VICIDIAL Servidor, Softswitch Barato, VoIP\u6279\u53d1\u4e1a\u52a1, \u8f6f\u4ea4\u6362\u6bd4\u8f83, Advance Routing, VOS3000 Troubleshooting Guide, VOS3000 CDR Analysis, Gu\u00eda Completa VOS3000 2026, VOS3000 \u6307\u5357 2026, SIP ALG Problems, VOS3000 gateway configuration, VoIP Fraud Prevention, VOS3000 Media Proxy, VOS3000 Call Termination Reasons\" title=\"\" class=\"lazyload\" 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Troubleshoot session timeout, account issues, balance problems, and analyze CDR for call failure diagnosis.<\/p>\n","protected":false},"author":1,"featured_media":2359,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[2],"tags":[5032,5029,5030,5031,5028,5008,4412,3112,3114,3115,5004,3106,5015,3821,3816,2294,5025,5011,3820,5021,5003,3116,5017,5016,5014,3113,5023,3822,5022,5009,3111,5020,5018,5012,5006,5007,5027,5026,3108,5005,5013,5024,4407,4812,5010,5019],"class_list":["post-2391","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vos3000","tag-h-323-cause-codes","tag-sip-4xx-errors","tag-sip-5xx-errors","tag-sip-6xx-errors","tag-voip-disconnect-reasons","tag-vos3000-account-disabled","tag-vos3000-account-expired","tag-vos3000-account-locked","tag-vos3000-busy-signal","tag-vos3000-call-analysis","tag-vos3000-call-drop","tag-vos3000-call-failure","tag-vos3000-call-forwarding","tag-vos3000-call-rejected","tag-vos3000-call-termination","tag-vos3000-cdr-analysis","tag-vos3000-congestion","tag-vos3000-connection-limit","tag-vos3000-connection-timeout","tag-vos3000-destination-out-of-order","tag-vos3000-disconnect-reason","tag-vos3000-error-codes","tag-vos3000-forcible-hangup","tag-vos3000-forwarding-loop","tag-vos3000-h-323-error-codes","tag-vos3000-insufficient-balance","tag-vos3000-network-out-of-order","tag-vos3000-no-answer","tag-vos3000-no-circuit-channel","tag-vos3000-no-matching-account","tag-vos3000-no-matching-rate","tag-vos3000-no-response","tag-vos3000-normal-call-clearing","tag-vos3000-number-restricted","tag-vos3000-proceeding-timeout","tag-vos3000-protocol-limit","tag-vos3000-qos-not-available","tag-vos3000-resource-unavailable","tag-vos3000-response-timeout","tag-vos3000-session-timeout","tag-vos3000-sip-error-codes","tag-vos3000-temporary-failure","tag-vos3000-termination-reason","tag-vos3000-troubleshooting-guide","tag-vos3000-unregistered-endpoint","tag-vos3000-user-busy"],"acf":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/multahost.com\/blog\/wp-content\/uploads\/2026\/03\/SIP-ALG-Problems-VOS3000-gateway-configuration-VoIP-Fraud-Prevention-VOS3000-Media-Proxy-VOS3000-Call-Termination-Reasons-2.png?fit=1536%2C688&ssl=1?v=1774979683","jetpack-related-posts":[{"id":1630,"url":"https:\/\/multahost.com\/blog\/vos3000-call-termination\/","url_meta":{"origin":2391,"position":0},"title":"VOS3000 Call Termination Reasons Dictionary: Important Full Reference Guide","author":"king","date":"March 8, 2026","format":false,"excerpt":"VOS3000 call termination reasons dictionary: complete reference of server\u2011side, SIP, and H.323 call end codes. 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