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From: lwj@cs.kun.nl (Luc Rooijakkers)
Newsgroups: comp.sys.sequent
Subject: Re: naive question about tty ports
Message-ID: <2643@wn1.sci.kun.nl>
Date: 16 Jan 91 15:45:17 GMT
References: <14@mcglin.wpg.com>
Sender: root@sci.kun.nl
Lines: 24

In <14@mcglin.wpg.com> julia@mcglin.wpg.com (Julia Crawley) writes:

>In the next few weeks, my organization will be getting a Basic 4 
>GPX 6270 (i.e., a Sequent).  Our vendor is telling us that proper
>cabling of our in-house terminals will require four pairs?  Is this 
>true?  Or, will three wires for 2,3,&7 be sufficient?  

It probably depends on your version of Dynix. When I recently installed
a Sequent Symmetry with Dynix 3.0, we indeed needed four wires, since I
could not find any way to turn of the carrier detect. If you get
Sequent's System V port (Dynix/pts I believe), you might be able to turn
it off. Of course, you can also fake it in the connector by connecting
the DTR output to the DCD input.

By the way, you may actually *want* four wires. It has the very attractive
feature of automatically logging you out if you turn off your terminal,
which is good for your security. Besides, it usually saves processes.

Hope this helps

--
Luc Rooijakkers                                 Internet: lwj@cs.kun.nl
Faculty of Mathematics and Computer Science     UUCP: uunet!cs.kun.nl!lwj
University of Nijmegen, the Netherlands         tel. +3180652271