Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!utgpu!water!watnot!watmath!clyde!rutgers!brl-adm!seismo!mcvax!ukc!pyrltd!ttl!root
From: root@ttl.UUCP
Newsgroups: comp.mail.uucp,comp.bugs.4bsd
Subject: Re: uucp alarms, hangs, dies for no apparent reason.
Message-ID: <97@ttl.UUCP>
Date: Fri, 20-Mar-87 04:11:01 EST
Article-I.D.: ttl.97
Posted: Fri Mar 20 04:11:01 1987
Date-Received: Sun, 22-Mar-87 20:38:30 EST
References: <478@gouldsd.UUCP> <17903@ucbvax.BERKELEY.EDU>
Reply-To: root@ttl.UUCP (0000-Admin(0000))
Organization: Trading Technology Ltd.
Lines: 49
Xref: utgpu comp.mail.uucp:334 comp.bugs.4bsd:235


We too have had the problem of UUCP alarm-ing and dying. We are running
a Pyramid 98X, (4.2BSD) with release 3.1 of the OS. Our modem is a Quattro
SB2422 V22bis working in hayes compatible mode. It talks to the outside world
on an analogue phone line (ie not a high speed link).

It appears that the UUCICO gives the alarm because it missed a SYN from
the remote machine - this always seems to happen after a few minutes when
we run at 2400 baud. However, when we changed to 1200 baud the problem
went away and our phone bills doubled.

We talk to two different modems - an identical Quattro for 2400 baud,
and a hayes lookalike at 1200, so the problem may be the quattros
talking to each other. If it helps anyone, here are the commands we give
the modem. It is a normal ACU device:

L.devices: 
============

ACU ttyi00 unused 2400 hayestone "" AT OK ATV1E0H0 OK ATF5 OK AT&E2 OK
DIR ttyi00 0 2400

ACU ttyi00 unused 1200 hayestone "" AT OK ATV1E0H0 OK ATF4 OK AT&E0 OK
DIR ttyi00 0 1200

============

L.sys:
============

lowsp Any ACU 1200 9,123456789 etc...
highsp Any ACU 2400 9,123456789  etc...

============

There is no more chat inside L.sys, so L-devices does all the modem control.

My guess is that the error correction in the modem keeps losing a part of 
the packet (AT&E2 on the 2400) as the only other difference in the Devices file
is the speed (ATFn).

Any help gratefully received.


R. Manzie, Trading Technology.

=============
UUCP: ...ukc!pyrltd!ttl
ARPA: ttl.UUCP@ukc