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From: andrew@jhereg.osa.com (Andrew C. Esh)
Newsgroups: comp.dcom.lans
Subject: Re: another 10BaseT wiring question
Message-ID: <1991Apr9.231554.13721@jhereg.osa.com>
Date: 9 Apr 91 23:15:54 GMT
References: <9736@mentor.cc.purdue.edu>
Organization: Open Systems Architects, Inc., Mpls, MN
Lines: 34

In article <9736@mentor.cc.purdue.edu> lairdkb@mentor.cc.purdue.edu (Kyler Laird) writes:
>I saw the front of a Gateway (?) concentrator and ordered network cabling
>that terminates in modular (RJ-45) connectors.  I want this because I'll
>have ~14 connections and only 12 ports on the concentrator.  (I don't intend
>to ever use all at once.)
>
>Unfortunately, we got a David System's concentrator which uses a 50-pin telco
>connector.
>
>I'm looking for something like a harmonica adapter that would allow me to
>plug in 12 RJ-45 connectors and come out with a 50-pin telco connector.
>
>Any pointers?
>
>Thanks!
>
>--kyler

We have a David 10baseT in for eval, and it came with one. The thing isn't
really a harmonica, but is darn close. I'm pretty sure it came with the
David 10baseT cards that are in the box, but it's unmarked so I can't be
sure.

Before plugging anything in, be sure to check the pinouts of the David
50-pin socket on the front of the card, and check that the sockets in the
harmonica wind up being connected to the right pins. We found a harmonica
that worked fine for a terminal server, but the pins were wrong for
10baseT. All the pins for socket one were spread out as pin 1 on the first
four sockets, and so on for the rest. :-)
-- 
Andrew C. Esh			andrew@osa.com
Open Systems Architects, Inc.
Mpls, MN 55416-1528		Punch down, turn around, do a little crimpin'
(612) 525-0000			Punch down, turn around, plug it in and go ...