4364jo@hou2b.UUCP (08/27/83)
Technically, this is feasible but because of the expense has never been implimented in the telephone system. The gadget you propose on your tel set will only work if the calling number is sent forward. In many older electromechanical systems this number is usually chewed up at the CAMA office where charging takes place and it is not pulsed forward. However with the new electronic and digital systems especially with CCIS and its forms where signalling is over a separate channel it is much easier and less expensive and I believe very practical to send the calling number to a PBX or perhaps you. Hang in there! It is on the way! J. Orost
paulp@tekcad.UUCP (08/29/83)
#R:hou2b:-9700:tekcad:1800007:000:1191 tekcad!paulp Aug 28 23:18:00 1983 Actually the idea of sending the calling number as part of the ring signal (or whatever) to a phone suggests a devious idea: Bugging a phone could be done much more efficiently. Even with voice operated switches, there's a lot of boring material between the 'useful' portions of a tapped conversation. If the material is taped, essential if the operation is a one man show, the cassette may be exhausted before recording anything of interest. This is guaranteed to happen in a house with one or more teenagers. Using a box to recognize a list of numbers of interest could be a useful filter. The Soviets do much the same listening to telephone conversations that go over micro-wave links in places like Washington, San Francisco, etc. Over uwave, both the called and calling number are in the header that precedes the call. The equipment to select groups and individual numbers can be built or bought for a reasonable amount of money. Paul Pomes Usenet: {ucbvax,decvax,pur-ee,ihnss,chico}!teklabs!tekcad!paulp CSnet: paulp@tek ARPA: paulp.tek@rand-relay US Mail: Paul Pomes, Tektronix, Inc. Box 500 MS 59-323, Beaverton OR 97077 Phone: 503-627-2341