*BSD News Article 80386


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From: fgm@osinet.fr (Frederic MARAND)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: xaps over ppp connection (Q)
Date: Fri, 11 Oct 1996 06:00:26 GMT
Organization: Groupe SEDI / Agorus SA / OSI SARL /
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nvp@cs.buffalo.edu (Nathan V Patwardhan) wrote:

>Yes, better keep an extinguisher by yer desk ... you're setting the phone
>lines on fire.  :)  Seriously, don't forget that you are using a modem, and
>are transmitting an image/bitmap over the net.
I don't think so: xcalc is a small program sending rectangles and text
to be drawn, not images/bitmaps.

28.8 is actually sufficient though painfully slow, but using 28.8 kb/s
signalling does not mean data goes through the line at this speed. The
line may be noisy, the I/O card may overload the CPU with I/O
interrupts.

What's more, modem data compression sould be disabled, and IP header
compression enabled. But that's only part of the solution. The proper
solution for running X on serial is to use a specialized protocols,
like Xpress, not straight X on PPP.