Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!gatech!mcdchg!ddsw1!karl
From: karl@ddsw1.MCS.COM (Karl Denninger)
Newsgroups: comp.sys.amiga
Subject: Re: 9600 bps Modems
Summary: HSTs STINK on UUCP calls; that is why no one uses them on Unix!
Message-ID: <3686@ddsw1.MCS.COM>
Date: 5 Jul 89 20:42:41 GMT
References: <4533@crash.cts.com> <408@xdos.UUCP>
Reply-To: karl@ddsw1.MCS.COM (Karl Denninger)
Organization: Macro Computer Solutions, Inc., Mundelein, IL
Lines: 27

In article <408@xdos.UUCP> doug@xdos.UUCP (Doug Merritt) writes:
>In article <4533@crash.cts.com> spierce@pnet01.cts.com (Stuart Pierce) writes:
>>Here in San Diego, about 95% of the 9600-baud bulletin boards use U.S.
>>Robotics 9600 HST Modems.  The other 5% are Trailblazers.
>
>And in Unix land, about 95% are Trailblazers. So I guess you've really
>got to make up your mind whether your long term interest is in e.g.
>UUCP transfers or in bulletin boards.

Right.  And the reason?

HSTs get about 240 cps on UUCP calls!  That is right -- 2400 baud, even in
fast 9600/19200 baud mode!  Why?
	
	HST's backchannel won't accomodate the "ACK"s on the packets --
	meaning that every time you get an ACK, the line turns around.
	Throughput goes in the toilet.

If US Robotics had designed that monster a little better, they would have
taken the Unix world by storm (they don't miss the bandwidth requirement by
much, but it is enough to make the modems worthless for UUCP).  As it is
Telebit is my first and only choice when it comes to Unix machine modems.

--
Karl Denninger (karl@ddsw1.MCS.COM, <well-connected>!ddsw1!karl)
Public Access Data Line: [+1 312 566-8911], Voice: [+1 312 566-8910]
Macro Computer Solutions, Inc.		"Quality Solutions at a Fair Price"