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From: greil@guug.guug.de (Anton Greil)
Newsgroups: comp.mail.uucp,comp.dcom.modems
Subject: algorithmic supervising of a modem ?
Keywords: modems, UUCP
Message-ID: <658@guug.guug.de>
Date: 20 Apr 91 16:13:17 GMT
Sender: news@guug.guug.de
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Organization: GUUG e.V., Munich, W.-Germany
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How to build a procedure in UNIX (e.g. System V.3), which supervises a modem
in a UUCP (BNU) environment?

A procedure, which is periodically called by cron (e.g. all 15 minutes),
to examine if a modem is usable or just used (by cu, uucico) and not hanging 
in some undefined state.
If the modem or its UNIX environment is not ok, the procedure should do a 
reset of the serial line and/or a reset of the (Hayes compatible) modem by 
"Uutry -r -x9 modem" with a setup-entry in the "Dialers" file, and a reset 
of ... (???)

If the resets are not possible for the procedure, it notifies the system 
administrator. The modem port is to be used bidirectionally by uugetty.

 _____________________________________________________________________

     Radically asked:  
 
     Is the problem of supervising a modem solvable by an algorithm?
 ______________________________________________________________________

Because of the long coexistence of UNIX, UUCP, system administrators and modems
I'm full of hope to find some proofed solutions for this everyday problem !

Toni Greil, Muenchen (Germany)
greil@guug.guug.de