Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!decvax!ucbvax!roy@seismo.CSS.GOV@phri.UUCP
From: roy@seismo.CSS.GOV@phri.UUCP
Newsgroups: mod.telecom
Subject: Wiring diagram for 25-pair plugs
Message-ID: <8701210657.AA19208@ucbvax.Berkeley.EDU>
Date: Mon, 5-Jan-87 20:47:31 EST
Article-I.D.: ucbvax.8701210657.AA19208
Posted: Mon Jan  5 20:47:31 1987
Date-Received: Wed, 21-Jan-87 18:49:18 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: phri!roy@seismo.CSS.GOV (Roy Smith)
Organization: Public Health Research Institute, NYC, NY
Lines: 21
Approved: telecom@xx.lcs.mit.edu


	I have been appointed to hook up an answering machine in our
office, on one of those multi-line key phones.  I think they figured that
since I'm the computer jock, I must know how phones work.  Silly them. :-)
The phone has a 50-pin conectorized cable coming out of it; presumably all
I have to do is find the right pair and tap off some wires to an RJ-11 and
plug the answering machine in.  If somebody would be so good as to send me
a wiring diagram for the connector (is there a standard wiring pattern?) I
think I could take it from there.

	I found a little gizmo which has male and female 50-pin connectors
and a panel of about 2 dozen screw terminals bringing out many of the pins
in the "lower half" of the connectors (roughly pins 15-35).  The terminals
are labeled A1, A2, B1, B2 .... A12, B12, V, SG.  Most of the pins are
wired straight through from one connector to the other.  Some of the other
pins only go to a screw terminal, and some are wired straight through plus
a tap to a terminal.  I assume the [AB]# pairs are tip and ring (I don't
actually know much, but I can talk jargon as well as anyone) for each of 12
lines; is that right?  What about V and SG?  If I can find the right pair,
can I just hook the answering machine up to that and ignore the extra wires
for the key equipment hiding in a closet some where?