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From: Michael Smith <msmith@atrad.adelaide.edu.au>
Message-Id: <199508170712.QAA01150@genesis.atrad.adelaide.edu.au>
Subject: SLIP FAQ, a quick hint for whoever is updating...
To: doc@freebsd.org
Date: Thu, 17 Aug 1995 16:42:07 +0930 (CST)
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Just to pass along a useful result I've achieved maintaining a dialout
SLIP link, for the use of whomever may be maintaining/updating the SLIP
FAQ.

So far, every solution I've seen for maintaining a SLIP link has involved
kermit, which just doesn't get along at all well with SLIP lines.  

A much simpler, and easily as functional, approach is to make use of
slattach's ability to detect carrier, and its redial-command feature.

If we assume a 'standard' login process involving a "login:" and
"password:" prompt, and a Hayes-compatible modem appropriately configured,
we can use the chat program to automate dialling.

We prepare a chat script to do the work :

/root/chat.script :

ABORT BUSY
ABORT 'NO CARRIER'
TIMEOUT 60
'' ATZ
OK-ATZ-OK ATDTxxx-xxxx
ogin:--ogin: <username>
ssword: <password>

And a shell script as a wrapper to avoid redialling endlessly due to a line
or modem fault :

/root/slipdial :

#!/bin/sh
until chat -f /root/chat.script; do
	sleep 300;
done

(remember to chmod +x /root/slipdial)

Now invoke slattach as :

slattach -ahs 38400 -r /root/slipdial /dev/cuaa0

(Replace cuaa0 with whatever your serial port is)

-- 
]] Mike Smith, Software Engineer        msmith@atrad.adelaide.edu.au    [[
]] Genesis Software                     genesis@atrad.adelaide.edu.au   [[
]] High-speed data acquisition and                                      [[
]] realtime instrument control          (ph/fax) +61-8-267-3039         [[
]] My car has "demand start" -Terry Lambert  UNIX: live FreeBSD or die! [[