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From: normt@ihlpy.att.com (Norman R Tiedemann)
Newsgroups: comp.dcom.telecom
Subject: Re: Former 312-Area Ringback Prefixes
Message-ID: <14542@accuvax.nwu.edu>
Date: 9 Nov 90 17:01:31 GMT
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X-Telecom-Digest: Volume 10, Issue 806, Message 5 of 12


In article <14476@accuvax.nwu.edu>, the Moderator notes:

> [Moderator's Note: Well actually, the correct numbers are 1-571
> through 1-577. No area code, but you must use 1 plus the appropriate
> three digit code for your CO (571 through 577) plus the last four
> digits of the phone you want to ring back. For example xxx-2368 would
> be rung back by dialing 1-571-2368 (or 572, 573, whatever applies in
> your office -- test 'em all to find out which!) The corect combination
> will return dial tone. ...

Here at Bell Labs in Naperville, we have ISDN from IBT. This ring back
does not work through ISDN. Interestingly enough the phone number
voice back (1-200) works. Actually, it voiced back your number very
quietly and then give a loud annoying fast busy. You have to pull your
ear away fast after the number.

Anytime I try the ring back, it rings and then I get the intercept
tone and the "To call a number outside your area code, dial 1 plus
area code ... To call a number within your areacode just dial the seven
digit number."

I also noted that the touchtone test will not work if you do not
subscribe to touch tone service. (Or at least I couldn't get it to
work at home.)

If anyone knows how to ring back through ISDN, I'd be interested in
finding out how.


	Norm Tiedemann		AT&T Bell Labs IH 2G-419
	att!ihlpy!normt		2000 Naperville Rd.
	normt@ihlpy.att.com	Naperville, IL	60566