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From: Kovalcik@MIT-MULTICS.ARPA ("Richard Kovalcik, Jr.")
Newsgroups: mod.telecom
Subject: disabling touch-tone
Message-ID: <8601150657.AA04698@ucbvax.berkeley.edu>
Date: Tue, 14-Jan-86 09:17:00 EST
Article-I.D.: ucbvax.8601150657.AA04698
Posted: Tue Jan 14 09:17:00 1986
Date-Received: Thu, 16-Jan-86 00:59:23 EST
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Approved: telecom@mit-xx.arpa

Just because touch-tone doesn't work, doesn't mean it's disabled,
especially if you have an older ATT or ITT phone.  If you do not hear a
tone when you push the button, then you have tip and ring backwards
(reversed polarity).  If you do hear the tone and it doesn't break dial
tone, then touch-tone is disabled.

P.S.  Anyone seen those silly polarity reversers they sell for $5.95?  I
guess it's for people too scared to use a screwdriver on a junction box.