Hi I have a CUCM 7.1(5) with a trunk sip to a third party Contact Center....
All SCCP phone can call perfectly to the Contact Center and press the different option of the IVR menu...
Then we add 400 ·3905 IP phone to our solution and when a ·3905 call to the IVR through the Sip Trunk I hear the audio, then press for example 1 or 2 and DTMF don't work...
At the beggining I though It was a problem of SIP DTMF so I tried with inbound and outbound DTMF config on trunk also tried requiere MTP, etc..
The I took a 7911 and convert it to SIP, and unexpectedly I called to the IVR and DTMF works great...
So It's possible is any difference between 395 and 7911 SIP DTMF both using the standart sip profile??
Any idea why DTMF don't work with 3905 ?
Thanks..
