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- Path: sparky!uunet!usc!zaphod.mps.ohio-state.edu!news.acns.nwu.edu!telecom-request
- Date: 14 Sep 1992 23:13:41 -0500
- From: aaron@stat.tamu.edu (Aaron Hightower)
- Newsgroups: comp.dcom.telecom
- Subject: Touch Tone Decoding Projects: Mine Works, is There Better?
- Message-ID: <telecom12.713.15@eecs.nwu.edu>
- Organization: Texas A&M University, College Station
- Sender: Telecom@eecs.nwu.edu
- Approved: Telecom@eecs.nwu.edu
- X-Submissions-To: telecom@eecs.nwu.edu
- X-Administrivia-To: telecom-request@eecs.nwu.edu
- X-Telecom-Digest: Volume 12, Issue 713, Message 15 of 16
- Lines: 31
-
- I have a unit that I built entirely on my own that:
-
- * Is able to amplify and output preamp audio (from computer);
- * Is able to detect touch tones;
- * Is able to detect telephone ring signals;
- * Is able to determine status of phone call (did they hang up et al);
- * Is able to be controlled via my own language.
-
- The problem is that out of the $21.56 in parts, $7.18 is just for two
- audio-isolation transformers ...
-
- Can someone tell me more about how to make a good DAA that will
- conform to FCC part 68 for $7.18 or less (IE: not an entire DAA, but
- providing simply "two to four wire conversion" aka "hybrid circuit".)
-
- I have heard rumours about preassembled hybrid transformers for use in
- phones. Does anyone know a good source of these? Maybe someone would
- like to donate a sample so that I might buy many many in the future?
-
- If anyone needs info on how to get what I have working, I might have
- the inclination to put something together for you. ;-)
-
- Email me if you have a solution!
-
-
- Thanks,
-
- Aaron Hightower College of Engineering
- Texas A&M University College Station, TX 77840
-
-