Path: utzoo!utgpu!water!watmath!uunet!labrea!rutgers!njin!princeton!mccc!pjh
From: pjh@mccc.UUCP (Pete Holsberg)
Newsgroups: unix-pc.general
Subject: Re: serial port wiring for unix-pc
Keywords: how to
Message-ID: <806@mccc.UUCP>
Date: 6 Sep 88 01:33:44 GMT
References: <1639@ddsw1.UUCP>
Reply-To: pjh@mccc.UUCP (Pete Holsberg)
Distribution: na
Organization: The College On The Other Side of Route 1
Lines: 23

In article <1639@ddsw1.UUCP> jlg@ddsw1.UUCP (JL Gomez) writes:
...I have a question concering the wiring scheme for DTE to DTE connection.
...I am using a RJ-11 - DB25 adaptor.  The problem is that there are only
...4 wires available to connect.  I do know I need pins 2 & 3 crossed and
...pin 7 is a straight thru.  Now, what do I do with the extra wire and
...would I have to short any pins on the serial port end of the unix-pc?
...Thanks for the info.
...--
...JL Gomez


Some questions...What is the other DTE?  Does it have but 4 wires?  What
is the "extra" one?

The UNIX PC crosses 2 and 3, and connects 7 straight through as you have
said.  It expects 4 and 5 shorted, and 6, 8, and 20 shorted.  Note that
no control is passed across the interface with this connection.

Pete Holsberg                   UUCP: {...!rutgers!}princeton!mccc!pjh
Technology Division                   ...!att!jonlab!mccc!pjh
Mercer College			CompuServe: 70240,334
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