No audio only on one side

[Biber]

Since last Monday I have big problems with my 3CX.

I have a virtual server with only a public ipv4 with only a 3cx installed. The version is v12.5.44178.1002.
Since Monday I have no audio to some internal phones (Snom 760, 3CXPhone,...) for Example:

From Ext.            To Ext     Phone     Status
--------------------------------------------------
   74      <----->    30        Snom     Not Ok
   74      <----->    85        Snom        Ok
   85      <----->    30        Snom        Ok

The 3CX Firewall-Checker reports no problems. I have tried it with and without a stun-server.
Sometimes it there is also no audio from external calls.

Can anybody help me?

Thanks in advance

Biber

 

[timvanzee]

We've had it on occasion that a phone/extension has a one-way audio problem. Restarting the phone has always resolved it for us. Sorry I can't be more help.

 

[nb]

This is related to firewall mappings being closed or kept open (stale).
Check firewall rules
Disable stun
ensure you have a static public IP

 

[nb]

This is related to firewall mappings being closed or kept open (stale).
Check firewall rules
Disable stun
ensure you have a static public IP