Path: utzoo!utgpu!watmath!clyde!att!osu-cis!killer!vector!nobody From: kgdykes@watmath.waterloo.edu (Ken Dykes) Newsgroups: comp.dcom.telecom Subject: Building your own phone projects Message-ID: Date: 17 Nov 88 12:05:40 GMT Sender: chip@vector.UUCP Lines: 30 Approved: telecom-request@vector.uucp X-Submissions-To: telecom@bu-cs.bu.edu X-Administrivia-To: telecom-request@vector.uucp X-TELECOM-Digest: volume 8, issue 183, message 1 Someone asked if there was a way to "cross connect" two lines to get a 3-way conference call effect. Someone else asked if there was a way to restrict long-distance dialing. Well, there is a book of do it yourself phone projects, while i personally consider simplistic and definetely dated on what ICs are available, will provide "functional" circuits for the above two problems and others toys. ok, so i cant spell definitely Its a "SAMS" project book. SAMS Electronic Telephone Projects, 2nd edition by Anthony J. Caristi ISBN 0-672-22485-2 I found it at a local electronics parts store. It has introductory chapters on "phone wiring" princicples (basic) The back of the book says "To order" call 800-428-SAMS They appear to accept all major credit cards. Other projects included: - replace bell ringer with electronic ringer - broadcast phone conversation to nearby FM radio - CB telephone patch - hearing impaired lamp for ringer - 32 number memory - convert single phone into a two-line model and others. As i said, not great examples of electronic design, but functional, and possibly provide ideas or avenues-of-thinking for you.