two-way audio error

[Rachana.S]

Dear team,

I had got some problem on two-way audio call from 4G to the internal network IP phone and app client. I can heard only one side of the caller. Have anyone got this problem in your company, please suggested me if you have any solution!!! Thanks in advance!

My topology:
Internal Server (3CX software based) --> Firewall (Fortinet 1000c) --> Switch --> IP Phone.

Sincerely,
Tom

 

[Saqqara]

First port of call, have you run the 3CX firewall test and is everything green ?

 

[YiannisH_3CX]

Hello @Rachana.S

The first thing you need to check is if the firewall checker included in the PBX passes all tests.
https://www.3cx.com/docs/firewall-checker/

 

[Rachana.S]

First port of call, have you run the 3CX firewall test and is everything green ?

Not, some red

 

[cobaltit]

So you'll need to fix that then.

 

[leejor]

Is this a new install? If an older installation, that was recently updated, did you see this?
https://www.3cx.com/community/threads/3cx-phone-system-audio-ports-increased.60235/

 

[YiannisH_3CX]

In the link below you can find all ports that need to be forwarded on the firewall for the firewall checker to pass.
https://www.3cx.com/docs/ports/