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The Telecom Digest for May 29, 2012
Volume 31 : Issue 130 : "text" Format
====== 30 years of TELECOM Digest -- Founded August 21, 1981 ======
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Date: Sun, 27 May 2012 10:35:34 -0700
From: John David Galt <jdg@diogenes.sacramento.ca.us>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: Re: Feature Group B CICs and CACs prior to expansion
Message-ID: <jptoll$5qv$1@blue-new.rahul.net>
On 2012-05-26 21:34, Adam H. Kerman wrote:
>
> http://www.atis.org/inc/Docs/finaldocs/CIC-Assignment-Guidelines-Final-Document-05-25-12.doc
>
>
> I noticed this paper, which includes a short history of Carrier Identification
> Code assignments.
>
> CICs identify a carrier. The Carrier Access Code, the actual dialing sequence
> used by the calling party, incorporates the CIC.
>
> Prior to April, 1993, CICs were assigned for Fg.B and Fg.D access from the
> same pool. Fg.B CIC codes expanded to 4 digits at that time. I was trying
> to remember the Fg.B CAC prior to expansion. I thought it was 950-0XXX
> where X is any digit 0-9. With expansion, 0 was prepended to CIC.
>
> However, checking the NANPA list, there are also 1XXX CICs, suggesting that
> some three-digit CICs had 1 prepended. Prior to expansion, was the CAC also
> 950-1XXX for certain carriers?
MCI's was 950-1022. I guess they just chopped off the last digit of 10222
rather than the first.
I recall at least a couple of 950- numbers were assigned that were not for
LD carriers at all, but just for certain nationwide businesses with lots of
stores to have the same number everywhere. I suspect that they invented a
private IXC for the purpose. (A bank and a pizza place, IIRC.)
Date: Mon, 28 May 2012 11:41:31 +0000 (UTC)
From: danny burstein <dannyb@panix.com>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: Re: Feature Group B CICs and CACs prior to expansion
Message-ID: <jpvo9b$hug$1@reader1.panix.com>
In <jptoll$5qv$1@blue-new.rahul.net> John David Galt <jdg@diogenes.sacramento.ca.us> writes:
[snip]
>> However, checking the NANPA list, there are also 1XXX CICs, suggesting that
>> some three-digit CICs had 1 prepended. Prior to expansion, was the CAC also
>> 950-1XXX for certain carriers?
>MCI's was 950-1022. I guess they just chopped off the last digit of 10222
>rather than the first.
>I recall at least a couple of 950- numbers were assigned that were not for
>LD carriers at all, but just for certain nationwide businesses with lots of
>stores to have the same number everywhere. I suspect that they invented a
>private IXC for the purpose. (A bank and a pizza place, IIRC.)
I don't know what happened behind the curtain, but the
phone number used by the "credit card dial up machines"
used for Medicaid in the NYC region in (roughly) 1990
was a "950" line.
--
_____________________________________________________
Knowledge may be power, but communications is the key
dannyb@panix.com
[to foil spammers, my address has been double rot-13 encoded]
Date: Mon, 28 May 2012 01:18:30 -0400
From: tlvp <mPiOsUcB.EtLlLvEp@att.net>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: Re: Q.: Message waiting light ... how?
Message-ID: <1qm2vgo3ss0no$.zzg64vfo3os8.dlg@40tude.net>
On Sun, 27 May 2012 09:01:33 -0700 (PDT), John C. Fowler wrote:
> Replying to Message-ID: <1gnfwe7pv4kmy$.h6pz9hyzkp3c.dlg@40tude.net>
> ...
> If this is a regular POTS line from the phone company, chances are the
> box is just going off hook and listening for a stutter dial tone, to
> indicate a message waiting, any time after the phone has been used. ...
You and the Wikipedia article I quoted from in my response to John Levine
support each other quite nicely, so I think I can safely take "stutter
tone" and simple dial tone as the answers :-) .
Thank you! Cheers, -- tlvp
--
Avant de repondre, jeter la poubelle, SVP.
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