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Today's Topics:
1. Re: Ambiguous dial plan pattern matching (Jay Ashworth)
----------------------------------------------------------------------
Message: 1
Date: Thu, 6 Dec 2012 15:14:01 -0500 (EST)
From: Jay Ashworth <[email protected]>
To: [email protected]
Subject: Re: [VoiceOps] Ambiguous dial plan pattern matching
Message-ID:
<[email protected]>
Content-Type: text/plain; charset=utf-8
----- Original Message -----
> On Dec 3, 2012, at 5:21 PM, "Mary Lou Carey"
> <[email protected]<mailto:[email protected]>> wrote:
> > Seven digit dialing is only used in areas where there is one NPA for
> > the
> > local area. Ten digit dialing is used in areas where there is an
> > overlay
> > (more than one NPA per local area) and 11 digit (1 plus) is used in
> > areas
> > where there was an area code split. The difference between a split
> > and an
> > overlay is that a split required everyone (existing and new end
> > users) to
> > change their NPA to the new area code. Overlays allow you to assign
> > numbers
> > from the new NPA to new end users but allows the existing end users
> > to keep
> > their old NPA.
Note that while it's technically possible for the switch in an overlay
area to assume the same NPA on a 7-digit dialled call as that of the
calling line, the FCC forbids this, in an attempt to make it less forbidding
to take a number in the overlay NPA: the incumbent numbers get no accidental
pioneer's preference.
In a related story, your cellphone may accept 7D numbers in it's phonebook
and dial them properly for you (unless you have Metro, who for some reason
think that's A Bad Idea), but I guarantee you you can't send SMS messages
to them unless you add the NPA in, so do. :-)
Cheers,
-- jra
--
Jay R. Ashworth Baylink [email protected]
Designer The Things I Think RFC 2100
Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII
St Petersburg FL USA #natog +1 727 647 1274
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End of VoiceOps Digest, Vol 42, Issue 9
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