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From: hutch@sdcsvax.UUCP
Newsgroups: comp.unix.wizards
Subject: Re: Filtering Everything
Message-ID: <3011@sdcsvax.UCSD.EDU>
Date: Sat, 18-Apr-87 15:12:42 EST
Article-I.D.: sdcsvax.3011
Posted: Sat Apr 18 15:12:42 1987
Date-Received: Sun, 19-Apr-87 05:44:48 EST
References: <919@watmum.UUCP> <6447@bu-cs.BU.EDU> <65@dalcsug.UUCP>
Reply-To: hutch@sdcsvax.UCSD.EDU (Jim Hutchison)
Distribution: comp
Organization: UCSD EMU Project (Educational Microcomputer Unix)
Lines: 21

<>
Well, after you get your streams/pty/tty code finished, you will still
be stuck with a truly nasty problem.  Line errors.  If you compress
the signal (characters) at 2:1, you will be multiplying the effects of
line noise.  If you use a state table driven compressor ala LZ you will
have to write code to recover from noise (interesting trick that will be),
or else go into hopeless noise mode until manual intervention.

With MNP and a good line, you may be able to get away with a lot, but
during this response I have been troubled by more donuts and squiggles
then I would care to have multiplied by any number > 1.0.

Good luck with it.  With modems at ~$250 for 2400 baud, it would still be
nice to be told that I am completely wrong and can have a 4800+ baud connection
to a local host from my pc (non-IBM).

-- 
    Jim Hutchison   		UUCP:	{dcdwest,ucbvax}!sdcsvax!hutch
		    		ARPA:	Hutch@sdcsvax.ucsd.edu
Disklame'r:
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