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Path: utzoo!linus!decvax!harpo!seismo!rlgvax!cvl!umcp-cs!zben
From: zben@umcp-cs.UUCP
Newsgroups: net.micro
Subject: Re: Modem UUUUU woes.
Message-ID: <6711@umcp-cs.UUCP>
Date: Mon, 23-Apr-84 06:48:57 EST
Article-I.D.: umcp-cs.6711
Posted: Mon Apr 23 06:48:57 1984
Date-Received: Tue, 24-Apr-84 00:54:17 EST
References: <12322@sri-arpa.UUCP>
Organization: Univ. of Maryland, Computer Science Dept.
Lines: 18

[There is a large, oversized SHell between you and your Unix...]

 The same thing happens to me occasionally using a Penril 1200 baud modem.
One of the modems (and I cannot know whether it is my modem or the modems
at the central site) decides to go into some testing mode.  Large numbers
of the letter U get sent in both directions.  Seems there is some out-of-
band signal by which one modem requests the other to go into test mode.
Line noise seems to occasionally trigger one of the modems of the pair.

 This is a minor hassle, but I recover by placing the local modem into the
test mode (with the switches on the front panel), then a few seconds later
popping it back into normal mode.  This seems to send the out-of-band
signal, and puts the OTHER modem back into normal mode. 

 Try this (although if you don't have switches you may be up the creek).

-- 
Ben Cranston   ...seismo!umcp-cs!zben      zben@umd2.ARPA