Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!spool.mu.edu!cs.umn.edu!kas!rhealey
From: rhealey@kas.helios.mn.org (Rob Healey)
Newsgroups: comp.sys.amiga.datacomm
Subject: Re: A 9600 baud modem for $169!!!
Message-ID: <218@kas.helios.mn.org>
Date: 13 Jun 91 22:43:52 GMT
References: <29138@know.pws.bull.com> <9149@ucdavis.ucdavis.edu> <9154@ucdavis.ucdavis.edu>
Organization: Rob's home system, Hopkins, MN
Lines: 32

In article <9154@ucdavis.ucdavis.edu> s142075@fred.ucdavis.edu (Brewski Rogers) writes:
>dan the man zerkle says:
>>o There's a catch.  No, I don't know what the catch is.  However,
>>  there must be some reason that this thing sells for a third of
>>  the price of comparable equipment.  If the "standards" people
>>  could have come up with something that offers the same perfformance
>>  at a considerably lower cost, why didn't they?
>
	They get 9600 baud on a good day with the wind blowing in the
	right direction... I.e. they are 2400 baud modems with V.42bis
	compression that can get 4:1 compression when compressing a
	file of zero's... VERY misleading advertising. Most of the time
	you'd be lucky to get 4800 baud throughput on these things and
	when you did the interactive performance would be VERY jerky.

>full-duplex 9600 bps is just about the dumbest thing I ever heard of.
>Anyone who NEEDS to send AND receive at full speed (as opposed to
>1 9600 bps and 1 450 bps channel) please respond. I'd be glad to hear
>what all that extra technology is being used for.
>
	You must not work at a place that needs to transfer alot of
	data quickly over common carrier phone lines... V.32 allows
	for bidirectional transfer at 9600 baud. Now personally, I
	prefer my T2500 that does 19K or so in one direction and <110
	on the ACK channel. But there are many reasons in business to
	transfer 9600+ baud in both directions at once, i.e. updating
	databases while loading the receipts from a days sales.

	Full-duplex 9600 isn't dumb, it's just that most hobbiests and
	students/academics wouldn't see any obvious use.

		-Rob