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From: larry@kitty.UUCP (Larry Lippman)
Newsgroups: net.dcom
Subject: Re: }i
Message-ID: <468@kitty.UUCP>
Date: Thu, 3-Oct-85 12:03:29 EDT
Article-I.D.: kitty.468
Posted: Thu Oct  3 12:03:29 1985
Date-Received: Sun, 6-Oct-85 04:24:49 EDT
References: <2330@sunybcs.UUCP>
Distribution: net
Organization: Recognition Research Corp., Clarence, NY
Lines: 25

> My 1200-baud Hayes and home phone line sometimes hiccup lots of "}i"s
> onto the screen.  Does anybody know what is going on?

	The most common error characters on a 212A-type modem running at
1200 bits/second are:

	``}''	which is 01111101 binary
	``~''	which is 01111110 binary
		which is 01111111 binary

	These characters are common due to the long string of binary 1's
caused by a dibit phase shift error resulting from line noise.  Often, you
will also see two error characters in a row, with one of them most likely
being one of the above three.

	Better quality modems (like AT&T, Rixon, Vadic, etc.) tend to be more
noise immune than Hayes, based upon my experience.

+++  Larry Lippman @ Recognition Research Corp., Clarence, New York        +++
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