Path: utzoo!utgpu!news-server.csri.toronto.edu!torsqnt!tmsoft!becker!bdb
From: bdb@becker.UUCP (Bruce D. Becker)
Newsgroups: comp.sys.amiga.datacomm
Subject: Re: 19200bps
Message-ID: <99904@becker.UUCP>
Date: 10 May 91 15:27:21 GMT
References: <1492@caslon.cs.arizona.edu> <1187@uqcspe.cs.uq.oz.au> <1991May7.001557.23299@NCoast.ORG>
Organization: G. T. S., Toronto, Ontario, Canada
Lines: 32

In article <1991May7.001557.23299@NCoast.ORG> allbery@ncoast.ORG (Brandon S. Allbery KB8JRR/AA) writes:
|As quoted from <1187@uqcspe.cs.uq.oz.au> by muzzle@cs.uq.oz.au (Murray Chapman):
|+---------------
|| Hang on! Doesn't the TrailBlazer modem do 19200 baud????
|+---------------
|
|The Trailblazer gets 18400 baud using compression; the maximum uncompressed
|rate is 10600 baud.  Unidirectional; it has to turn the line around to send
|data the other way, which is why the TB has the various "spoofing" modes in
|it.

	This isn't quite correct. The Telebit's
	maximum theoretical speed is 18400 bits
	per second - but about 20% of that gets
	eaten up by error correction. This does
	not have anything to do with compressed
	data transfers.

	In fact it is not a good idea to enable
	data compression for news batches since
	the modem will attempt to compress data
	which was already compressed, resulting
	in a net loss of throughput. In general
	it is always better to compress data in
	the machine so that the serial port has
	as little data to deal with as it can.

-- 
  ,u,	 Bruce Becker	Toronto, Ontario
a /i/	 Internet: bdb@becker.UUCP, bruce@gpu.utcs.toronto.edu
 `\o\-e	 UUCP: ...!utai!mnetor!becker!bdb
 _< /_	 "It's the death of the net as we know it (and I feel fine)" - R.A.M.