asterisk users - Jul 2007 - b410p and DTMF: dtmfthreshold in 1.2.18 zaptel drivers please?

I have the same problem as the following:

http://threebit.net/mail-archive/asterisk-users/msg36602.html

I am using a b410p (Wildcard) in TE mode on 4 channels of ISDN2e and it
totally fails to detect incoming DTMF. The newer mISDN drivers have a
parameter "dtmfthreshold" where you can tune the volume above which
DTMF
detection is initiated. However (I've tried it) the newest (1.1.14/15)
mISDN drivers don't work with the b410p (the second port will not come
up and Asterisk refuses to route inbound or outbound).

There is a define "DMTF_THRESH" in the zaptel sources but I think that
only applies to Zap-type cards - I tried adjusting this in the source
from the default of 4000 down to as low as 400 and still no joy. In the
mISDN.org sources dtmfthresold is a module parameter and appears in
various dsp_* source files - but not at all in the Digium sources.

Anyone got inbound DTMF working with this card yet?

I am using the 1.2.18 release of the zaptel drivers from Digium - I
presume the 1.4.x are only meant for asterisk 1.4.x and wouldn't want to
break my PBX by trying them (I'm running ast 1.2.20).

This is pretty high priority for me as we need to add an IVR menu -
without DTMF it's obviously going to be a futile exercise.

Cheers

Alex

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