Phone audio Drops out with Google Cloud Installation

[Cody Fontaine]

I have determined that this not an issue with phone system, but the remote connection to the phone system. It seems when making a call internally or externally the audio drops where the caller can no longer hear the person calling in or called, yet the person called/calling in can hear the caller.

The handsets are fanvil x3 and x4

this does not occur on yealink t21 e2 or the smartphone app or the windows client.

the installation is a cloud installation at google with g1-small (1 vCPU, 1.7 GB memory) and based on the statistics, does not seem to be over committed.

Any advise would be helpful

 

[Saqqara]

Have your tried ticking 'PBX Delivers Audio' under the Options tab for the extension

How are the phones provisioned - STUN or SBC. If STUN how many phones are configured this way ?

 

[Cody Fontaine]

Yes PBX delivers audio is checked.

Phones are provisioned via stun total extension is 29 - of those 18 are the fanvils

 

[leejor]

With that many extensions, you might be best off investing a bit (and it's really not much), in a Raspberry Pi 3CX SBC.

https://www.3cx.com/docs/3cx-tunnel-session-border-controller/

 

[YiannisH_3CX]

Hello @Cody Fontaine

Make sure that the phones have individual SIP and RTP ports and these ports are forwarded correctly to the local IP of the phone.
https://www.3cx.com/3cxacademy/videos/intermediate/configuring-remote-extensions/