[comp.dcom.telecom] Looking for DTMF Generation Software and Phone Interface Info

broehl@watserv1.waterloo.edu (Bernie Roehl) (03/01/90)

We're looking for a routine for doing DTMF synthesis on a TSP50C44 (a
speech chip from TI).  If anyone out there has done this, or has code
for any other chip to do the same thing, we'd love to hear from you!

(And if you can tell us how to do DTMF *decoding* in software without
a DSP, you'll have our undying gratitude!)

We're also trying to figure out how to safely, reliably interface some
computer equipment to the telephone line.  What we want is something
that will attach to the line (meeting all CRTC and FCC specs) and give
us audio in, audio out, ring detect and hook control (i.e. we want the
computer to detect when the phone is ringing, be able to answer it,
and be able to listen to and speak to the line).

Any ideas/suggestions/comments would be much appreciated.

Thanks in advance.


	Bernie Roehl, University of Waterloo Electrical Engineering Dept
	Mail: broehl@watserv1.waterloo.edu OR broehl@watserv1.UWaterloo.ca
	BangPath: {allegra,decvax,utzoo,clyde}!watmath!watserv1!broehl
	Voice:  (519) 747-5056 [home]  (519) 885-1211 x 2607 [work]