Xref: utzoo comp.dcom.modems:3414 comp.mail.uucp:2773
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!unmvax!gatech!mcdchg!ditka!kls
From: kls@ditka.UUCP (Karl Swartz)
Newsgroups: comp.dcom.modems,comp.mail.uucp
Subject: Re: Problems with HDB uucp xfer
Summary: lcoking the interface speed works (usually)
Message-ID: <815@ditka.UUCP>
Date: 20 Feb 89 20:18:23 GMT
References: <257@utgard.UUCP> <173@n8ino.UUCP> <24285@amdcad.AMD.COM> <1488@neoucom.UUCP> <13224@electron.mips.COM>
Reply-To: kls@ditka.UUCP (Karl Swartz)
Distribution: na
Organization: Inaction Central, Los Alamos, New Mexico
Lines: 30

In article <13224@electron.mips.COM> wilkes@mips.COM (John Wilkes) writes:
>| 1) Canonical rule passed down directly from the all powerful dieties:
>| You cannot lock the interface speed.  Interface speed _must_ flow with
>| the transmission speed ...
>| 
>| If you lock the interface speed, I guarantee that you will fail
>| connections to some sites, and some sites will fail connections to
>| you.  Yes, this is actually a bug buried somewhere in the 4.0 ROMs,

>Can anyone confirm/deny this?  Telebit, are you reading this?

Yes, there is a problem in the 4.0 ROMs that can cause problems with
certain modems if you lock the interface speed.  Evidently, with a
locked interface speed, the TrailBlazer shaves a slight amount off
of each stop bit, so if things are set for 1 stop bit you actually
get a tad less.  Some modems gag on this.

In practice, I run a locked interface speed for incoming calls and
the only problems I've had are the the on-board modem of a UNIX PC.
These modems also tend to pretend they support MNP even though they
don't, and probably have other problems too.  No other modems (not
that I've tested all of them in existence) have had problems.

And yes, word is that the next ROM update will fix this problem.

-- 
Karl Swartz		|UUCP	{ames!hc!rt1,decuac!netsys}!ditka!kls
1-505/667-7777 (work)	|ARPA	rt1!ditka!kls@hc.dspo.gov
1-505/672-3113 (home)	|BIX	kswartz
"I never let my schooling get in the way of my education."  (Twain)