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From: hayes!tnixon@uunet.uu.net (Toby Nixon)
Newsgroups: comp.dcom.telecom
Subject: Re: The Tone That Prompts For Calling Card Number
Message-ID: <15210@accuvax.nwu.edu>
Date: 5 Dec 90 00:37:11 GMT
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X-Telecom-Digest: Volume 10, Issue 864, Message 13 of 14


In article <15178@accuvax.nwu.edu>, jon_sree@world.std.com (Jon
Sreekanth) writes: 

>  From a public phone, for example, to make an operator assisted call,
> or to make a calling card, one might dial 0 - area code - number. Then
> there's a pause, and a sound best described as a 'boiiiing', or a
> 'pinnng', and after that, one enters the calling card number (or after
> time out, operator comes on line.)

> What are the specs on that tone? Frequency (single, or mixture of
> frequencies), envelope, duration, etc.

I can't quote all the specs to you (and can't look them up, because
I'm in a hotel room in Florida rather than in my office), but I CAN
tell you where to find the info:

	Notes on the BOC Intra-LATA Networks-1986
	TR-NPL-000275 Issue 1, April 1986
	Page 6-180
	Table AQ, Item 24
	Calling Card Service Prompt Tone

If you don't have this TR, you can order it from Bellcore.


Toby Nixon, Principal Engineer    | Voice   +1-404-449-8791  Telex 151243420
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