[152571] in North American Network Operators' Group
Re: VoIP vs POTS (was Re: Operation Ghost Click)
daemon@ATHENA.MIT.EDU (Jay Ashworth)
Wed May 2 20:25:35 2012
Date: Wed, 2 May 2012 20:25:00 -0400 (EDT)
From: Jay Ashworth <jra@baylink.com>
To: NANOG <nanog@nanog.org>
In-Reply-To: <4FA1C4F1.8070909@mompl.net>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
----- Original Message -----
> From: "Jeroen van Aart" <jeroen@mompl.net>
> I don't doubt it. However my practical experience is such that 100% of
> the time (I lost count after 20 or so, in a decade) I experienced a
> power failure the phone would still work. I am sure I am not the only
> one.
Sure. (We're not really having this conversation here, are we? :-)
Copper POTS service is centrally powered from a battery plant in the wire
center, which is generally something like -52V nominal at 6000-8000ADC
continuous.
If you get a tool across those busbars uninsulated, it will flash into
plasma much faster than you can blink; this happened at SPBGFLXA89H in
the... mid to late 80s? I no longer remember the details, but the guy
couldn't hear for several days, and the *entire* CO -- 30klines of GTD-5
and 100klines of 5E Remote -- was No Dial Tone for at least 12 hours
while they cleaned it up; SPPD and PCSO were stationed on streetcorners
to take emergency reports.
Cheers,
-- jra
--
Jay R. Ashworth Baylink jra@baylink.com
Designer The Things I Think RFC 2100
Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII
St Petersburg FL USA http://photo.imageinc.us +1 727 647 1274
