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From: "Martin Harriss (ACP" <cellar!martin@bellcore.bellcore.com>
Newsgroups: comp.dcom.telecom
Subject: Re: E Series Recommendations Excerpts
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Date: 31 Aug 90 14:42:15 GMT
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X-Telecom-Digest: Volume 10, Issue 610, Message 7 of 11


[ Much stuff deleted about CCITT recomendations]

Ok, here's today's trivia question: what were the following tones used
for:

[ quoted from CCITT reccomendations about tones that answering machines
shouldn't use ]

>		2040 and 2400 Hz 
>		600 and 750 Hz
>		1200 and 1600 Hz
>		500 and 20 Hz
>		1000 and 20 Hz

Some of them, I think, may be a little obscure to North American
readers.  I'll followup with some answers in a couple of days.


Martin Harriss
martin@cellar.bae.bellcore.com