I have a customer's phone system that has an attached IVR. Essentially, there is a 3rd party SIP device installed on the phone system. Calls to the IVR get routed to this SIP device's number and the IVR monitors it and "picks it up". There are no trunks involved in this setup.
The calls come into an MGCP gateway over a PRI from the telco.
In CUCM, on the gateway config, DTMF Relay is set to NTE-GW.
The IVR vendor is saying that they are receiving both in-band DTMF and RFC 2833 DTMF and it's messing up their system. They want ONLY 2833 DTMF. In this scenario, where there are not trunks, I don't know of any place I can set DTMF other than on the MGCP gateway config in CUCM and that's already set to NTE-GW, which I believe is 2833.
Does anyone know how I can cut the in-band DTMF?
