Unsupported Audio Delay & echo problem when the call is transferred to an external number (mobile)

[Nawaz552]

I set up a call queue of 10 agents with a round-robin. I am using Yeaster 200(VOIP).
We are experiencing a 10-12 seconds audio delay before connecting the agents to an external number. Yeaster and PBX are setups locally.
Any setting I am missing?

 

[leejor]

So the call rings the agent, but there is no audio either way for 10 to 12 seconds? Do other extensions have issues with incoming calls? Have you had a look at the Activity Log for any signs of an error, when the call connects?

Are the sets using the same Codec as the trunk? Are calls being recorded?

 

[ChrisC_3CX]

Provided that I understood correctly and the device you mention is an FXO gateway then I do have to mention that we won't be able to help much as it's not a 3CX Supported device. That said, a few things you can try to narrow it down are:
1. Route calls directly to an extension that's connected via a webclient.
2. Connect an analogue device (phone) directly to the PSTN line and answer an incoming call.

Does any of the above get rid of the audio delay?
• If the first one does then the issue might be related to the IP Phones used for the queue, if any, or that specific 3CX config in particular. EDIT: As per the duplicate post, the calls are being routed out to mobile numbers again so the issue may be related to that outgoing call instead.
• If the second one does then it might be the FXO gateway you're using.
• If none of the two does then it's probably something to do with the provider.

Note: Also please do let us know if using the mobile apps instead of mobile numbers gets rid of the delay and echo.