No audio on Outbound calls on my end

[tastycoders]

Here is the setup,
Onsite 3cx Server
Softphones on-site - Windows 10

Inbound calls: I can hear them and they can hear me.

Outbound calls: When I dial out they can hear me but I cannot hear them. This happens about 80% of the time. the other 20% Both can hear.

I am at a loss as to why this is occurring.

 

[leejor]

It sounds (no pun intended), as if you have a firewall, or (lack of) port forwarding issue. Run the 3CX Firewall checker and be sure that all tests pass.

https://www.3cx.com/docs/ports/

You will probably be concerned with audio ports 9000-10999 UDP

 

[tastycoders]

I ran the test and it seems like all the 9000+ UDP ports are correct.
Here is a link to the video showing test results.
https://www.screencast.com/t/KOuS3gduhzM

 

[tastycoders]

Also let me update the audio. It seems that it is one side or the other that has no audio. I just ran a few more tests and it can switch to the other party not being able to hear.

 

[Lee Cramman]

Might be worth disabling SIP ALG

 

[leejor]

Did this just start, out of the blue? Were changes made to anything ? New installation?