Some of the IVR systems does not recognize DTMF tone especially when dialing the DTMF tones very fastly. We use call manager and a cisco voice gateway for sending calls to service provider. Is there a way to change the dtmf frequency timers or what should we look/change ?
If it's only to a particular IVR then it's an issue with the IVR. There is no way to slow down the DTMF relay process other then having the calling party dial slower. If you see the h245 messages for each digit then the router is doing that it should.
We're having the same problem here. Verizon Wireless simply does not see keyed responses from Cisco VOIP telephones. They do recognize keyed input from our old Rolm Phones. Recently we received a report that a local grade school didn't accept key inputs. Has a solution been found to this issue?