Xref: utzoo comp.protocols.misc:312 comp.dcom.modems:2087
Path: utzoo!attcan!uunet!portal!cup.portal.com!thad
From: thad@cup.portal.com
Newsgroups: comp.protocols.misc,comp.dcom.modems
Subject: Re: UUUUU
Message-ID: <7307@cup.portal.com>
Date: 13 Jul 88 09:21:49 GMT
References: <407880.880706.KFL@AI.AI.MIT.EDU> <2799@ttrdc.UUCP>
Organization: The Portal System (TM)
Lines: 14
XPortal-User-Id: 1.1001.2826

As a user of hundreds of different modems (which I've had to test for use
with my products), the "UUUUU..." problem is a symptom of having been
forced into { analog | digital } loopback test and/or another test routine(s).

if you glance at your ASCII chart, receipt of "UUUUU..." is the bit-stream:

    0101010101010101010101010101.....

Most "reasonable" modems have either a DIP-switch and/or a soft-option to
disable any and all remote and local digital and analog (loopback) tests;
I disable ALL that junk if possible, and if the modem doesn't support
disabling those options, then I toss the modem out the window and over the
fence (there are a LOT of modems out there now, and the fence collapsed last
year! :-)