[cisco-voip] Sip trunk problem

[Ryan Ratliff]

From what I recall any SIP trunk in CCM 4.2 requires an MTP and if you don't any hardware resources available then your only option is the software MTP which only supports g.711.  

You will find SIP support in that version of CCM is very limited.  You may want to try adding the router as an H.323 gateway and testing to see if that protocol gets you better results. 

-Ryan

On Feb 11, 2010, at 1:53 PM, Mirko Maffioli wrote:

I've two trunk sip on my  voice gateway (2801): one directed to my callmanager 4.2 (very old version) and one directed to my carrier voip.

When i made an outbound call everything works (with codec g711, i don't know why since in the dial-peer i wrote a voice class with g729 with high priority).
When i try an inbound call my phone ring but audio doesn't works.

I think that the problem is in the callmanager - voicegateway trunk since if i connect a phone directly to the 2801 (with the cme configuration) everythings works fine.

Do you have some ideas?

Bye
Mirko
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