Path: utzoo!utgpu!water!watmath!onfcanim!dave
From: dave@onfcanim.UUCP (Dave Martindale)
Newsgroups: sci.electronics
Subject: Re: 9600 baud modems
Message-ID: <15687@onfcanim.UUCP>
Date: 29 Jul 88 06:25:44 GMT
References: <1127@nunki.usc.edu> <478@ns.UUCP> <1044@unccvax.UUCP> <506@ns.UUCP> <1988Jul23.203605.20716@utzoo.uucp> <1047@unccvax.UUCP>
Reply-To: dave@onfcanim.UUCP (Dave Martindale)
Organization: National Film Board / Office national du film, Montreal
Lines: 12

Actually, the Telebit Trailblazer's modulation technique allows it to
transmit at about 18000 bps on a relatively clean line.  With protocol
and error control overhead, plus occasionally turning around the line
for ACKS (the modem is really half-duplex) the actual throughput in
one direction is about 14000 bps, provided there is no traffic in the
reverse direction.

I have personally seen throughput of above 1300 characters per second
of approximately-random data (compress output) with the modem's
compression algorithm turned off.  And the limiting factor was that
my poor 780 was spending 100% of its time pushing characters around;
the modem was probably capable of more.