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From: bas%athens.tmc.edu@iex.iex.com (Brad Simmons)
Newsgroups: comp.dcom.telecom
Subject: Re: Need Info on AT&T Sceptre Teletext Terminal
Message-ID: <6175@accuvax.nwu.edu>
Date: 9 Apr 90 05:13:32 GMT
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X-Telecom-Digest: Volume 10, Issue 241, Message 6 of 7


Your terminal was designed to work with AT&T's LADT (Local Area Data
Transport) videotex service.  This service was put into commercial
service in Florida, with the Knight Ridder newspaper chain supplying
the database, from about late 1982 till sometime in 1984(?) (it's been
a long time ;-).  There were two versions of the terminal: one that
had a built in 9600 baud limited distance modem (for data on top of
voice that allowed both the customer's voice connection and data
connection to be sharing the same phone line), and one with a built in
1200 baud modem.  In either case they were designed to talk to
proprietary terminal concentrators located in the Central Office.  To
the best of my somewhat foggy rememberance at this point, there is no
compatibility of this terminal with any existing commercial modem
standards.