Incoming call audio delay

[viciovb]

Hello,

We are using 3CX V12 and we are facing an annoying problem: when one of the extension (with an Yealink T42 phone) receives a phone call, it is necessary to wait about 5 seconds before the other person can hear us and sometimes the person just hangs up thinking there is no one there.

We haven't changed anything on our firewall and the problem started about 2 weeks ago. A

All other extensions work without issue.

Any ideas of what could cause the problem?

Thank you

 

[eddv123]

Well I would say firstly - upgrade your 3CX System, being on v12 is not a good idea.

As a test I would also try enabling "PBX Delivers audio" on your 3CX extensions and see if this solves the issue. Go to Extensions > Options > PBX Delivers audio.

 

[YiannisH_3CX]

Also in addition to what eddv123 mentioned try a different device (or a 3CX client) on the extension since the issue is with the one extension. See if the issue persists.