Hi Guys,
I have a strange voice problem on my ITSP trunk.
When I selected the G.729 codec to restrict the codec usage on the trunk, I faced with one way audio problem on outgoing calls which were using this trunk.
When I don’t specify any codec on the trunk, there is no problem.
After I made a lot of test and tried a lot of different configuration, I noticed that I can call from some of my internal clients.
Then I detaily investigated the problem again and I saw a very strange behavior in my tests.
You can find my test reults below.
Trunk Codec | Client Codec | Result
Only G.729a | G711.a,G729a | Failure. One-way Audio. Trunk side could hear the internal client.Internal client couldnot hear the trunk side.
Only G.729a | G729.a,G711a | Failure. One-way Audio. Trunk side could hear the internal client.Internal client couldnot hear the trunk side.
Only G.729a | Only G711a | Success. Two-way Audio.
Only G.729a | Only G729a | Success. Two-way Audio.
This is a common behavior for the following user agents.
• Audiocodes Media Pack
• Thomson 2030
When I tested this behavior with Eyebeam, I could successfuly call in all codec configuration.
Then I realized that the eyebeam doesn’t send the SDP with the Invite and it is accepting the codec selection according to PBXNSIP.
Is it a known problem?
Thanks...
Regards,
Jean I.