IP: Whose Circuit Is Busy?

[Dave Farber <farber () cis upenn edu>]

> From: <jspira () basex com>
> Importance: High
> To: farber () cis upenn edu
>
> Dave,
>
> In recent weeks, I've noticed that many of my attempts at telephone calls,
> be they via my mobile or wireline phone, are greeted by a cheery voice
> announcing, "We're sorry.  All Circuits Are Busy.  Please Try Your Call
> Later."  This is also known as an All Circuits Busy (ACB) condition.
>
> The problem is that, most of these don't have any tags which indicate which
> provider is busy.
>
> Case in point: I call from my home, served by Verizon, to a Sprint mobile
> number.  Male voice announcing ACB.  No indication of network origin.  I
> don't know whether Verizon has insufficient capacity, or Sprint, or the
> internetworking between the two is overtaxed.
>
> Another call: I call from my home, to Ulster County (also served by
> Verizon).  Female voice, announcing ACB.  Quickly switch to my mobile,
> served by Voicestream, and my call to the same number is greeted by a male
> voice announcing an ACB.
>
> Perhaps IPers have some ideas.
>
> I can't believe that, after years of excess network capacity, we are
> suddenly running short.
>
> /s/ Jonathan
>
> Jonathan B Spira                   The Basex Group, Inc.
> Chairman                                 Empire State Building
> jspira () basex com         350 Fifth Avenue Suite 3018
> http://www.basex.com          New York, NY  10118
> Tel: +1(212) 760-1555 ext 113 Fax: +1(212) 760-1724
> --------------------------------------------------------------------------------------------