Article View: comp.sys.sequent
Article #453Re: naive question about tty ports
From: Scott Thurston
Date: Wed, 16 Jan 1991 16:05
Date: Wed, 16 Jan 1991 16:05
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In article <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? % %-- %Julia Crawley -- (504) 586-1200 %julia@mcglin.wpg.com %uunet!wpg!mcglin!julia You will need a signal driving DCD (pin 8) on the Sequent side of the connection. If DCD is not high when an open is attempted on the port, the open will not complete. Commonly, DTR (pin 20) on the terminal is used to drive DCD on the Sequent. Then, when the terminal is shut off, DCD is dropped and the port is closed and a HANGUP sent to processes associated with the port. -- Scott Thurston UUCP: ...!uunet!sequent!scottie Technical Support Engineer Internet: scottie@sequent.com Sequent Computer Systems, Inc (503) 578-3878 15450 SW Koll Parkway Beaverton, OR 97006
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!zephyr.ens.tek.com!tektronix!sequent!scottie From: scottie@sequent.UUCP (Scott Thurston) Newsgroups: comp.sys.sequent Subject: Re: naive question about tty ports Message-ID: <50708@sequent.UUCP> Date: 16 Jan 91 16:05:43 GMT References: <14@mcglin.wpg.com> Reply-To: scottie@crg8.UUCP (Scott Thurston (ex-zoomie)) Organization: Sequent Computer Systems, Inc Lines: 23