Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!seismo!rutgers!ames!oliveb!pyramid!decwrl!labrea!Umunhum!paulf
From: paulf@Umunhum.STANFORD.EDU (Paul A. Flaherty, N9FZX)
Newsgroups: comp.unix.wizards
Subject: EWE-EWE-SEE-PEA and pseudohayes modems
Message-ID: <1685@Umunhum.STANFORD.EDU>
Date: Thu, 21-May-87 22:32:18 EDT
Article-I.D.: Umunhum.1685
Posted: Thu May 21 22:32:18 1987
Date-Received: Sat, 23-May-87 14:42:56 EDT
Organization: The Three Packeteers
Lines: 31
Keywords: uucp, uucico, modems

This might save someone from a few hours of frustration.

I'm running a binary - only V7 on a pdp-11/23 box.  Add to that a CTS 2424
2400 bps Hayes compatible, which turned out to be a bit too compatible.

My expect - send sequence looked something like:

OK-AT^M-OK ATDT5551212 gin:--gin:-^M-gin: uucp

After sending the dial string to the modem, uucico would patiently wait about
thirty seconds, looking for gin:.  Since the call was still in progress at the
end of the waiting period, uucico then proceeded to the "null send".  

Unfortunately, "--" results in a ^M being send down the line, which, true
to the Hayes standard, hangs up the call.  So, I was stuck, since I didn't
have a true "null send".

The solution to this (suggested by my roommate, a med student at that...) was
to drop the modem into command mode after dialing; with the CTS 2424,
this is done as follows:

OK-AT^M-OK ATDT5551212; 1200-ATO^M-1200 ^M gin:--gin: uucp

A pretty bizarre little hack, but it does work.  So, if you're ever stuck with
a very primitive dialing scriptor, check it out.

-- 
Paul Flaherty, N9FZX					>->-_->->
Computer Systems Lab -- Stanford University		    |		Project
ARPAnet: paulf@shasta.Stanford.EDU	        	  =====		 OSCAR
AMnet: N9FZX @ N6IIU				          =====