Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!sgi!vjs@rhyolite.SGI.COM
From: vjs@rhyolite.SGI.COM (Vernon Schryver)
Newsgroups: comp.dcom.modems
Subject: Re: About "+++" in-band escapes
Summary: easy to turn off
Message-ID: <27278@sgi.SGI.COM>
Date: 22 Feb 89 20:09:12 GMT
References: <20335@lll-winken.LLNL.GOV> <20736@lll-winken.LLNL.GOV> <3695@phri.UUCP>
Sender: daemon@sgi.SGI.COM
Organization: Silicon Graphics, Inc., Mountain View, CA
Lines: 21

In article <3695@phri.UUCP>, roy@phri.UUCP (Roy Smith) writes:
> 	Various people have been grousing about the "+++" in-band escape
> Hayes-like modems have to cut off a call.  While I agree in principle that
> there should be a way to turn it off (and a out-of-band way, like a dip
> switch),
> -- 
> Roy Smith, System Administrator
> Public Health Research Institute
> {allegra,philabs,cmcl2,rutgers}!phri!roy -or- phri!roy@uunet.uu.net

It's easy to turn off '+++' in the modems I've played with, including
Hayes, Everex, and Telebit, by setting the '+' character to 128.  In some
modems, one must also avoid turning on 8-bit matching.  I vaguely recall
at least one manual recommending this hack.  With HDB UUCP, its easy
to turn it off when computers are supposed to be talking to computers,
but leave it on for trusted humans.  (Think of the "use" a bad guy
can make of '+++'.)

Vernon Schryver
Silicon Graphics
vjs@sgi.com