Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!cs.utexas.edu!rice!sun-spots-request
From: weiser.pa@xerox.com
Newsgroups: comp.sys.sun
Subject: Re: SLIP via Telebit on 3/50 + 4.0.3
Keywords: Miscellaneous
Message-ID: <3805@brazos.Rice.edu>
Date: 2 Dec 89 20:39:38 GMT
Sender: root@rice.edu
Organization: Sun-Spots
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Approved: Sun-Spots@rice.edu
X-Refs:  Original: v8n204
X-Sun-Spots-Digest: Volume 8, Issue 218, message 2 of 15

My experience with telebits and other "smart" modems that try to packetize
internally and do compression is that they do not do well at all with
SLIP.  I suspect the reason is that TCP is also packetizing and estimating
round-trip-times (RTT's), and the modems generally are tuned for terminal
interactive mode, and so TCP gets very confused.  I have heard of a
Telebit SLIP mode, but have no definite informatin.  Also, older TCP/IP
implementations (prior to 4.0.1 for suns) did not have Jacobson's and
Karel's TCP RTT estimation improvements, which make a huge difference on
any but the most trivial uses of slip.  (E.g. they make a huge difference
when rcping two files at once, or typing during an rcp).

-mark