calls not being answered

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hank.burton

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Calls into a specific number recently have been mostly failing. I have the calls directly forwarded to the conferencing extension, but it doesn't matter which extension I use to answer the call. On occasion I get a call in, but if I call again afterwards, it fails. I'm not the only one who has experienced this problem. Fortunately, this isn't their main phone number and only used for a direct access into the conferencing system. Their main number doesn't appear to have any issues.

On review of the logs in 3CX, I see when the call is answered but on all the others there is nothing. We use Telnyx for the service, and in their logs I see RECOVERY_ON_TIMER_EXPIRE on all but the calls that did answer.

I've tried changes at the phone system, restarted the phone system, a couple of changes with the config in Telnyx and nothing has resolved the issue. I have not rebuilt the SIP Trunk instance yet.

Is this a Telnyx issue or a 3CX phone system issue?

It is v18 Update 1 for 3CX. Client states that they didn't have problems w/ v16.

Thanks for your help.
 
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You should set the 3CX to verbose logging and then also do a wireshark capture to see what's going on.

What trunks do you use for the main number?
 
I'm pretty sure Telnyx was actually experiencing issues lately so you might want to check with them first, especially if only the affected SIP Trunk is with Telnyx.

If you want to check it on your end, what @kieferschild mentioned would be the way to go.
 
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