I'm trying to test out G.729 using my provider which they said should work with 3CX just fine. I removed all the codecs except for G.729 and restarted all the 3CX services. I made an inbound call and watched the packets with Wireshark. After the invite packets I saw G.711 info. Also tried watching using the network monitor. The bandwidth consumption was the same as well. This is with an enterprise version that shows 16 channels of G.729 available. Has anyone tested this out?