I know g729 is for VOIP calls to make good use of bandwidth and I know that PSTN (E1 or T1) should use g711 since they are un-compressed. But in my CM 4.1(3) setup, all my calls via PSTN (incoming and outgoing) use g729, even if my IP Phone and the H323 gateway are in the same Device Pool, hence using the same Region. Any thoughts?
that's dial peer, region and phone capabilities config. make sure the DP is set to G711 and the region is G711. if no avail you'll need to look at a CUCM trace to see why it fails
if this helps, please rate