[cisco-voip] Gateway to G.729 Region calls

[Matthew Melbourne]

Hi,

I'm just setting up a Region for using G.729 across the WAN. In
addition, we have introduced some transcoding resources for access to
CRS and Unity (and this works fine using a G.729-only Region; I can
see transcoding resources being invoked).

However, more fundamentally, called entering the voice gateways from
the PSTN, and destined for G.729-only handsets are being set up, but
there is no audio (in either direction). If I place the call on hold
on the IP Phone, the other end hears CCM MoH and when the call is
released, the audio path is present, using the G.729 codec.

On the gateway, I can see that the G.729 VOIP leg has been established
(before and after the call is placed on hold):

voice-gw1#sh call active voice compact | inc g729
49632 ORG     T781   g729br8     VOIP        P       10.80.2.42:16384
49631 ORG     T781   g729br8     TELE        P

The gateways are MGCP-controlled and are running 12.4(15)T3.

If I change the phone's Region to use G.711 only, then everything is fine.

Cheers,

Matt

-- 
Matthew Melbourne