I have an H323 gateway (28xx IOS) off of a Call Manager 5.1.3. I have SCCP 7960 and 7961's. Phones are registered with the CCM 5.1.3 and I have route patterns configured to route calls out via the H323 gateway. The calls are being routed out from the H323 via SIP Trunk. SIP is configured to send invites to our internal SBC which sets up calls with our carrier. I can establish calls and communicate w/ both 711 and 729 codecs. I just can't get dtmf to work outbound and I can't place a call on hold and resume. I can place the call on hold but I don't hear music and the phone display shows the call active for several seconds then I press hold again and I get an end call option..no resume. Anyone else have issues with a similiar design?
Tried implementing software MTP resources on gateway but they don't seem to work.