[asterisk-dev] Clipped DTMF on Zap Channel - 1.4-r93000 - VLDTMF Incompatibility?

[Russell Bryant]

Gregory Boehnlein wrote:
> However, when I do a Ztmonitor, I can hear only a 1 or 2 ms DTMF tone.
> 
> Now.. the system that is sending the SIP packets to the 1.4 box is an
> Asterisk 1.2 box. What I assume is happening is that the 1.2 system is
> sending the old style rapid fire DTMF events, and the Asterisk 1.4 box is
> processing them in the way that a sane RFC-2833 gateway would and starting
> the DTMF, then immediately ending it upon receipt of the "end of event"
> marker.

Do you have the "rfc2833compensate" option enabled in sip.conf?  If you don't,
turn it on and see if that fixes it for you.  It should.

-- 
Russell Bryant
Senior Software Engineer
Open Source Team Lead
Digium, Inc.