Dear Community,
I have configured U1960 PBX with STC SIP Lines. All lines are connected succesfully. SIP Server is also connected. When initiating a call from outside it is ringing also but when the call is established, there is no voice heard on both sides.
I have checked the Codecs.
I have checked the router. All traffic is allowed.
There is no FIrewall in the Network.
There are two POTS users as well. SIP number is alowed to it. When call is established, both parties can hear each other.
The only issue is with the IP Phone.
Any suggestions are welcome.
