[cisco-voip] Problems with Conference, Transfer, and Hold between Nortel QSig, h.323, and UCM

[Ryan Dowdy]

Here's the situation:

Nortel PBX (QSig)  -> Cisco 2921 (H.323) -> Cisco 3945 (H.323) -> UCM 8.5.1

Calls coming from the Nortel to the UCM complete fine, but Hold, 
Transfer and Conference do not work.  The call hears silence for a few 
seconds - up to 30 sec - and then the call disconnects.  Calls only 
initiate in the above direction.  Not sending calls directly to UCM 
because some calls go out PRIs on the 3945 (maybe I can put dial peers 
on the 2921, pointed to the subscriber, specifically for UCM?).  Tried 
checking the Requires MTP box on the UCM Gateway config.  A colleague 
suggested:

*voice service voip**
supplementary-service h450.2
**supplementary-service h450.3
*


Hadn't tried this yet because I did not want to affect calls as this 
site it always critical and in use - never any real down time.  Just 
looking for suggestions.  Anyone have some?

Ryan

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