Hi!
I have following scheme:
SCCP IP Phone (as example 7971) > CUCM version 11.0 - SIP Trunk > SIP Dial-peer - GW 2811 12.4(24)T6 - FXO > Telco (PSTN)
The problem is that when i try to call from Cisco IP Phone to some IVR number through PSTN - dtmf does not work.
On CUCM i have following configuration:
1. Media Termination Point Required - off
2. DTMF Signaling Method - No preference
On 2811:
dial-peer voice 10 voip
session protocol sipv2
session target ipv4:<ip address of CUCM>
dtmf-relay sip-notify
codec g711ulaw
If i enable Media Termination Point Required on CUCM everything is working fine, but i don't want to do this.
Is it possible to make this scheme work without of using MTP resources?
Thank you!
