Hi All, I have set up a sip trunk to a isp via CUBE h323 gateway and call manager 5.1.3 all voice call are fine but DMTF tones are not working correctly. Inbound tones work to a IVR but not to phone and outbound tones don't work at all.
I have implemented the changes you have suggested which worked, however I have now come across another problem. When calling in over the SIP trunk and I go through the IVR and get transferred to the operator queue, I do not hear ringback while I'm queuing. If I call in over the ISDN circuit and go through the IVR and get transferred to the operator queue the call never gets delivered to a agent.
Now if I remove MTP from the gateway configuration in Call Manager and I dial in over SIP to the operator queue I hear MoH and if I dial in using ISDN to the operator queue I get ringback. However if try to dial out with MTP disabled all outbound SIP calls fail and the call gets routed out over ISDN.
Hi Nick, I have now enabled fast start on the gateway. If I call into the operator queue via the ivr I get MoH but if disable MoH I still don't get ringback. The same happens when I dial in via ISDN, but the call still never gets delivered to agent.
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