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From: grier@pinocchio.Berkeley.EDU (Jim Grier)
Newsgroups: comp.misc
Subject: Re: FCC doing it again...
Message-ID: <10542@encore.Encore.COM>
Date: 5 Dec 89 17:21:24 GMT
References: <254@zircon.UUCP> <253@zircon.UUCP> <1989Nov30.233030.16215@aqdata.uucp>
Sender: news@Encore.COM
Reply-To: grier@pinocchio.Berkeley.EDU (Jim Grier)
Lines: 26

In article <254@zircon.UUCP>, davidb@Pacer.UUCP (David Barts) writes:
> In article <1989Nov30.233030.16215@aqdata.uucp>, sullivan@aqdata.uucp
(Michael T. Sullivan) writes:
> -> . . .
> -> Sorry.  I've tried using tone on a "new" pulse line and tone just doesn't
> -> get through.
> 
> Oops, I guess not always.  Nevertheless, I've been able to use tone on
> a `pulse' line on every modern exchange I've tried (at least 10).

When our local (NYNEX) exchange converted from _very_ old pulse to a new
switching system last year,
I couldn't resist seeing whether my Touch-Tone phones worked or not. The
answer depended on the
make of phone. Standard old Western Electric phones with tone DO NOT
generate a tone; new-fangled
units that generate the tone from their own power source DO. I vaguely
recall something to do with
the polarity of the lines or something that is switched to gimmick the
older tone phones, but 
there is apparently no default block on tone recognition here.

Jim Grier
Encore Computer Corp.
grier@encore.com
508/460-0500 x2635