From: "Gareth" 
Subject: Re: Phone connecting to audio lead
Date: 1998/03/09
Message-ID: #1/1
References: 
Organization: [posted via] UK Online Ltd
Newsgroups: alt.dcom.telecom,alt.support.telecommute,alt.technology.misc,comp.dcom.telecom.tech,fido.phones,rec.audio.tech,uk.tech.misc,uk.telecom


You can buy them from the larger - Maplin superstores (saw one last week in
Leeds for around 7 quid. They are, however, illegal and have the red sticker
on them - not authorised for direct connection........

A legal way is to go for one of those records from the Innovations Catalogue
which is a small portable tape recorder. The pickup snaps around the outside
of the phone lead - i.e. induction coupling. So no direct connection so
legal - the only snag is the price - around 150 quid.

You can also get pickups which attack with a sucker to the telephone handset
and plug into the rec jack of a tape recorder - quick and dirty solution for
a few pounds.

Gareth
P.S. we only use 2 of the 4 wires in the UK - the red and the white I think.
Transmit and receive over the same pair using different carrier freq..
Careful though as there is also the ring circuit on this pair - 50vDC - with
enough current to ring a couple of bells and so plenty enough to blow up any
homebrew circuits you put on.



Adrian Webb wrote in message ...
>I want to connect my telephone extension socket to an audio lead. On the UK
>domestic phone lead there is 4 wires. Which ones are the audio and audio
>shield? I've heard that telephone leads are digital and so none of them
are.
>This can't be true can it? I mean a cheap 7.50ukp phone thats converts
>digital signals into analogue. The power must be separate from audio.
>On a phone doubler, it is like audio isn't it, in that one wire splits off
>into two, sending out two audio signals for two phones? This is what i want
>to do, but one of them connecting to an audio lead.
>--
>Adrian Webb    also at:
>                       Adrian.Webb@discovery.dmpriest.com
>
>