Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!cs.utexas.edu!asuvax!mcdphx!citek.UUCP!hbg6
From: hbg6@citek.UUCP (John Schuch)
Newsgroups: sci.electronics
Subject: Re: telephone systems
Keywords: jack wiring telephone
Message-ID: <12218@mcdphx.phx.mcd.mot.com>
Date: 29 Dec 89 23:41:47 GMT
References: <4370@crdgw1.crd.ge.com>
Sender: root@mcdphx.phx.mcd.mot.com
Reply-To: hbg6@citek.UUCP (John Schuch)
Organization: Motorola Microcomputer Division, Tempe, Az.
Lines: 21

In article <4370@crdgw1.crd.ge.com> esmonddp@jupiter.crd.ge.com (Daniel P. Esmond) writes:
>Grabbing my meter I tested the line, and sure enough there is a
>constant 120 volts on the green wire. Being curious I began to trace
>.......
>wired daisy chain fashion, and there is an AC transformer in the
>loop. The secondary is only 16 volts, so trying to locate the
>
>- Dan


The 16Vac transformer usually drives the LEDs which light up the dial
on 'trim line' style phones. If you don't have those phones, possibly
someone else did and left the transformer. I usually remove it and toss
it into my shop junk box ( I'll find a use for them SOME day :-) ).

I also had a brief problem with HVac on a phone line but it went away
when the phone company swung the wires over to the next pole so than
the phone wires were not parallel to the 440Vac power lines into the
shop. We toasted two modems before we figured it out.

[John]