From: utzoo!decvax!ucbvax!teletext Newsgroups: fa.teletext Title: Videotext Future Shock -- call waiting Article-I.D.: ucbvax.7709 Posted: Sat Jun 19 14:34:52 1982 Received: Sun Jun 20 05:57:42 1982 >From SIRBU@MIT-MC Sat Jun 19 14:33:58 1982 If you look in the Proceedings of the 1981 National Telecommunications Conference, you will find an article by someone from AT&T on a technology called "Local Area Data Transport -LADT" (don't ask me how they think up such awful names!) The technology would provide for simultaneous voice and data over a single phone line at speeds up to 8 kbps (although initial applications will be limited to 4.8). The technology is similar to that currently being pedaled by Teltone for use with your office PBX. Basically, the data is frequency multiplexed above the voice and taken off the line at the entrance to the central office, multiplexed and sent to a packet switch. It is my undertanding that AT&T plans to use this technology for the Coral Gables trial in 1983. The technology also allows home fire and security alarm systems to run over the same data link. Marvin Sirbu