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From: BILLW@sri-kl@sri-unix.UUCP
Newsgroups: net.micro
Subject: Re: Query Re: USR Modems
Message-ID: <12432@sri-arpa.UUCP>
Date: Tue, 4-Oct-83 17:11:00 EDT
Article-I.D.: sri-arpa.12432
Posted: Tue Oct  4 17:11:00 1983
Date-Received: Wed, 19-Oct-83 21:25:00 EDT
Lines: 25

We just installed a US Robotics Password 1200 on each of four large
systems here (as dial out modems), so I will make some comments:

	1) They apear to work pretty well.

	2) Forget "hayes compatable"
To a human, the interface looks largely the same.  The USR supports a useful
SUBSET of the hayes commands.  However, from the literal minded veiwpoint
of a computer, they behave quite differently:

	a) The USR has no "independent" command mode.  Getting back to
	   Command mode hangs up the phone, no ifs, ands, or buts.
	b) Commands are responded to differently.  What caused problems
	   here was that the HAYES responds "OK" to a reset command, and
	   not at all to a null command ("AT<crlf>"), and the USR does
	   exactly the oposite.
	c) The USR comes up in a mode where command characters are NOT
	   echoed.  this is also oposite the hayes.

There are some other more minor differeces, that are less important.

Yeah, its probably worth the money, Make sure your "hayes" compatible
software really works with it, or be prepared to modify same....

BillW