Voip : Cannot Transfer Call H323 and SIP

[connect101]

Hello,

I'm using CUCM5.1 and a Voice Gateway 3845.

The call is like this :

CUCM <- SIP -> RtCisco3845 <-H323-> H323 Provider International

My problem is that I cannot transfer the International Call.

For example :

I call my mobile phone with a soft phone (registerd into a CUCM), the call is possible and the conversation can start.

But when I want to transfer the call to another IPPhone, It's not possible.

I can push the button Transfer but nothing happens.

Any issue?

Thank you

[dconstantino]

Sounds like MTP not setup for the H323 to SIP conversion of CODEC mismatch. Try using transcoders on the gateway. If you have DSP on them.