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From: hurf@batcomputer.TN.CORNELL.EDU (Hurf Sheldon)
Newsgroups: net.unix-wizards,net.unix
Subject: Re: Arcane modem configuration (was Re: Modems on Ultrix)
Message-ID: <928@batcomputer.TN.CORNELL.EDU>
Date: Fri, 22-Aug-86 08:55:56 EDT
Article-I.D.: batcompu.928
Posted: Fri Aug 22 08:55:56 1986
Date-Received: Sat, 23-Aug-86 05:09:26 EDT
References: <282@cirl.UUCP> <3030@umcp-cs.UUCP>
Reply-To: hurf@batcomputer.UUCP (Hurf Sheldon)
Distribution: net
Organization: Theory Center, Cornell University, Ithaca NY
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Xref: mnetor net.unix-wizards:7661 net.unix:5267


	I would like to pick one small nit with Chris's reply & that is that
 setting modem control on all ttys may not be so hot an idea. Without modem
 control we are able to restrict our cabling to pins 2,3 & 7 which cuts down
 considerably the number of wires you have to fool with & makes conversion to
 fiberoptics (which we do for RF protection in our labs) also very simple.

	Another nit with article 3250 re 4.3/Ultrix1.2 ttys 'shared' field -
 The flags must still be set in the driver for this to work correctly and the
 Modem must be set so dsr goes high in 'data mode' & cts goes high only when
 ready to transmit. Having these lines always held high will make the line
 look busy to 'tip' & fail to suppress looping to getty using 'kermit'.
 Looping in 'kermit' will also take place if the flag is not set in the driver.

	This whole discussion has been very worthwile - I had similar
 problems some time ago & Fred Avolio from decuac answered most of these
 same questions here on the net - but the nature of my need was such that
 much of the detail provided by this discussion never came up. A useful
 service...

     Hurf Sheldon			Arpa.css: Hurf@ionvax.tn.cornell.edu
     Lab of Plasma Studies	
     369 Upson Hall			phone: 607 255 7267
     Cornell University
     Ithaca, N.Y. 14853