VOS3000 Call Termination Reasons Dictionary: Important Full Reference Guide

VOS3000 Call Termination Reasons Dictionary: Important Full Reference Guide – Call End Reason

When troubleshooting call failures in VOS3000, the termination reason shown in CDRs is your most valuable diagnostic tool. However, many of these reasons are cryptic or misunderstood. This comprehensive VOS3000 termination reasons dictionary explains every possible call end code – both server‑generated and those received from connected devices.

Bookmark this page for quick reference whenever you encounter unexpected call failures.

Table of ContentsVOS3000 Call Termination Reasons Dictionary: Important Full Reference Guide – Call End ReasonHow VOS3000 Call Termination Reasons RecordsServer‑Side VOS3000 Call Termination Reasons (VOS3000 Generated)SIP Device Termination Reasons (Response Codes) – VOS3000 Call TerminationH.323 Device Termination Reasons – VOS3000 Call TerminationHow to Use This Information for Troubleshooting – VOS3000 Call TerminationFrequently Asked Questions (VOS3000 Call Termination)What does “No matching rate” mean?Why do I see “Illegal call” in CDRs?What causes “488 Not Acceptable Here”?How do I distinguish between a local hang‑up and a remote hang‑up?My CDR shows “Response timeout” – what should I check?Conclusion – VOS3000 Call TerminationFurther Resources

How VOS3000 Call Termination Reasons Records

Every CDR in VOS3000 includes a termination reason field. This value tells you exactly why the call ended – whether it was rejected, timed out, hung up normally, or failed due to an error. Reasons come from three sources:

Server‑side – generated by the VOS3000 softswitch itself

H.323 device – received from the far‑end H.323 gateway or terminal

SIP device – received from the far‑end SIP equipment (as response codes)

Understanding these codes helps you pinpoint whether the problem is with your configuration, your carrier, or the destination network.

Server‑Side VOS3000 Call Termination Reasons (VOS3000 Generated)

These reasons are created by the VOS3000 softswitch when it decides to terminate a call. They often indicate configuration issues, resource limitations, or policy enforcement.

SIP Device Termination Reasons (Response Codes) – VOS3000 Call Termination

When a call fails because of the remote SIP device, VOS3000 records the SIP response code received. Here are the most common ones:

H.323 Device Termination Reasons – VOS3000 Call Termination

H.323 devices return Q.931 cause codes. Common ones include:

How to Use This Information for Troubleshooting – VOS3000 Call Termination

When you see a call failure, follow this process:

Check the termination reason in the CDR.

Identify the source – server, SIP, or H.323.

Look for patterns – does it happen to one prefix, one gateway, or all calls?

Examine logs – use “Call Analysis” in the VOS3000 client to see the full signaling exchange.

Check configurations – rates, blacklists, number lengths, account balances.

Test with routing analysis – simulate the call to see which gateway would be chosen.

Frequently Asked Questions (VOS3000 Call Termination)

What does “No matching rate” mean?

This means the dialed number’s prefix did not match any rate in the rate group assigned to the caller’s account. You need to add the missing rate prefix or adjust the caller’s rate group.

Why do I see “Illegal call” in CDRs?

“Illegal call” means the incoming IP address was not recognized as a valid mapping gateway, and the caller number did not match any registered phone. This is often a hacking attempt – block the IP immediately and review your firewall rules.

What causes “488 Not Acceptable Here”?

This SIP error means the remote gateway does not support any of the codecs offered by your system. Check codec settings on both sides and ensure at least one common codec (e.g., G.729, G.711) is enabled.

How do I distinguish between a local hang‑up and a remote hang‑up?

The CDR field “Hangup side” tells you: 0 = caller, 1 = callee, 2 = server. Combined with termination reason, you can see exactly who ended the call and why.

My CDR shows “Response timeout” – what should I check?

First, verify the routing gateway is online and reachable. Then check if the remote side is answering other calls. If only specific prefixes fail, the carrier may not be sending progress signals – increase the timeout settings in the routing gateway configuration.

Conclusion – VOS3000 Call Termination

Understanding VOS3000 termination reasons is the fastest path to resolving call failures. Bookmark this reference and refer to it whenever you encounter an unfamiliar code. With practice, you’ll be able to diagnose most issues in seconds.

Need help troubleshooting persistent call failures? Contact us on WhatsApp for expert assistance: +8801911119966

Further Resources

VOS3000 Official Site

VOS3000 Official Blog

VOS3000 Downloads

Multahost Blog

NoAvailableRouter Error Explained

Error Code Replacement Guide

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