Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!uunet!beartrk!ceilidh!dnichols
From: dnichols@ceilidh.beartrack.com (DoN Nichols)
Newsgroups: comp.sys.3b1
Subject: Re: HDB UUCP doesn't switch speeds??
Message-ID: <1991Mar8.212145.5459@ceilidh.beartrack.com>
Date: 8 Mar 91 21:21:45 GMT
References: <1991Mar8.003509.500@wa8tzg.mi.org>
Distribution: na
Organization: D and D Data, Vienna, VA.
Lines: 53

In article <1991Mar8.003509.500@wa8tzg.mi.org> wwm@wa8tzg.mi.org (Bill Meahan) writes:

	[ ... ]

>Sometimes, the usual 2400-baud route to my newsfeed becomes temporarily
>unavailable for various reasons.  No sweat, there is a 1200-baud route
>on a different phone number so I've just simply added a SECOND entry for
>my newsfeed with a 1200-baud entry to my /usr/lib/uucp/Systems file.

	[ ... ]
>
>That DOES work with HDB UUCP on my HP9000/825 at work, but not with HDB
>UUCP on my trusty 3b1 at home.
>
>That's not quite true.  The 3b1 HDB **does** TRY to execute the N+1st
>entry, but if it is a different speed, the serial port doesn't get
>switched!!

	[ ... ]
>
>Anyone have any ideas?  I'm running 3.51m now, having upgraded from
>3.51a last week, and the problem persists.
>
>Thad?  Lenny?  Anybody??

	Well, I guess that I'm 'anybody'.  This is just a guess, I'm not an
expert on HDB - far from it - but is it possible that DTR isn't being
dropped between trys, since they're on the same port, and the modem, not
being reset, is not looking to re-determine the baudrate coming from the
serial port?  I haven't checked the modem I have here, but I think that it
might not expect to have its baud rate changed unless it is awaiting an 'AT'
after reset.

	What type of modem is it?

	If you have more serial ports available, you might try something
like hanging a second modem at 1200 on a different port, and letting the two
modems share the phone line.  (Obviously, if you have more than one system
that your system calls automatically, this could result in problems. :-)
Anyway, 1200-only modems should be cheap enough at hamfests by now.  I got
some good Ma-Bell type 1200-baud only modems for 15$ a couple or three years
ago.

	I saw the earlier article, but figured I'd leave it to the experts,
who then turned invisible :-)

	Good Luck
		DoN.
-- 
Donald Nichols (DoN.)		| Voice (Days):	(703) 664-1585
D&D Data			| Voice (Eves):	(703) 938-4564
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