Path: utzoo!attcan!uunet!mcvax!kth!draken!tut!tukki!makela
From: makela@tukki.jyu.fi (Otto J. Makela)
Newsgroups: sci.electronics
Subject: Re: How can I restrict outgoing phone calls?
Summary: it don't always work
Message-ID: <862@tukki.jyu.fi>
Date: 8 Jun 89 11:11:49 GMT
References: <778@tetons.UUCP> <244@csense.UUCP> <2437@rayssdb.ray.com> <4814@ptsfa.PacBell.COM> <43afec9f.16321@apollo.COM>
Reply-To: makela@tukki.jyu.fi (Otto J. Makela)
Organization: Grand Hall of Justice, Mega-City One
Lines: 26

In article <43afec9f.16321@apollo.COM>, ron_b@apollo.COM (Ronald Buttiglieri) says:
|I don't know how many know this (for all I know, everyone does :^) but a
|very simple way to make any TouchTone (tm?) phone (note, if it's pulse switchable,
|all bets are off!) not able to dial out, simply reverse the red and green
|wires (easiest to access them in the wall jack). You will hear a dialtone when
|you lift the handset, but when you press the buttons, you don't loose the dial-
|tone.
|
|Actually, I haven't tried it with the more modern phones (last I did this was
|3 or 4 years ago), I don't know if the newer ones are still affected. If
|someone finds that they are not, please let me (maybe the net, too) know.
|
|Ron

Well, most high-class phones over here have a full rectifier bridge across
the phone line before doing anything else with it.  That way it doesn't
matter which way the phone meets the line...

Otto J. Makela, University of Jyvaskyla
InterNet: makela@tukki.jyu.fi, BitNet: MAKELA_OTTO_@FINJYU.BITNET
BBS: +358 41 211 562 (V.22bis/V.22/V.21, 24h/d), Phone: +358 41 613 847
Mail: Kauppakatu 1 B 18, SF-40100 Jyvaskyla, Finland, EUROPE

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