Path: utzoo!mnetor!uunet!husc6!mit-eddie!ll-xn!ames!pacbell!att-ih!cuuxb!ltuxa!ll1a!cej
From: cej@ll1a.UUCP (Jones)
Newsgroups: comp.sys.mac
Subject: Re: A/UX and HAYES modems
Message-ID: <2219@ll1a.UUCP>
Date: 24 Mar 88 18:55:52 GMT
References: <17@fishpond.UUCP> <484@stech.UUCP>
Organization: AT&T, Lisle, Il.
Lines: 37
Summary: I must have been lucky

In article <484@stech.UUCP>, sysop@stech.UUCP (Jan Harrington) writes:
> Not that this is any help to you in particular, but I thought people
> on the net might be interested in knowing that Hayes modems in general
> are not very friendly with Unix System V.  It doesn't seem to matter
> what machine you're using.  Just try getting one to work
> bi-directionally! 
> 
> Jan Harrington, sysop


	Uhhh, Jan, I got several Hayes modems working
bi-directionally on several 3B2/300s and 3B2/400s running System V
with no trouble at all.  (Maybe that's because I didn't know I
should have had trouble ;-)

	What may have made it easy is that the 3B2s come with modem
connectors that have a few lines jumped together.  (I don't recall
which lines, right off hand, but if anyone would like to know, drop
me some e-mail, and I can find out.)  The problem some people seem to
have is that (at least on 3B2s) the uugetty expects that CD will be
high to indicate that the modem is alive *before* it will dial out,
but expects that the CD line will be "winked" low on loss of
carrier on both incoming and outgoing.  If your modem won't "wink"
CD on loss of carrier with the "CD always high" option set (my Hayes
modems did), or (sometimes) if you don't have the proper lines
jumped you will have problems getting a modem to work
bi-directionally.

	I'm no A/UX expert, mind you.  I don't know when I'll have
the cash and desire to add A/UX to my Mac II.  But I have gotten
Hayes, Ventel, and AT&T modems working bi-directionally on several
SysV systems.  So feel free to send me e-mail, and I'll share my
meager knowledge.

...ll1a!cej		[Just me, not AT&T]		Llewellyn Jones

		HASA Qualified - U.S. Approved