[cisco-voip] DTMF and SIP Devices

[Mark Rudholm]

In addition to the typical compliment of 79XX Cisco SCCP phones, I have 
a number of devices registered to CUCM 7.1.3 via SIP.  Devices like 
Polycom VVX 1500s and Tandberg teleconference units.  On calls between 
SIP devices I'm not getting proper DTMF signaling.  One of my SIP 
devices is a stand-alone conference bridge and the IVR mechanism can't 
work without DTMF.  I've looked in my device settings and my SIP profile 
settings and can't find anything that controls DTMF signaling mode.

Any pointers?

-Mark