RE: Verizon outage in Southern California?

> From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] On
> Behalf Of Matthew Black
> Sent: Tuesday, October 18, 2005 3:13 PM

> Telephone service is beginning to be restored in the Long
> Beach area but is still sporadic.

Our ATM WAN link through Sprint came back up around 1345 Central time,
and the two DS1s for the school's Internet service were revived about
fifteen minutes ago (1507 CDT). They've been rock-solid so something
must be going right out there.

When I called Sprint about any information they might have for the
outage the tech said that the area was down due to a Verizon DACS
failure. That must have been a spectacular failure, because
I'm reading
that it wiped out most everything (
http://www2.presstelegram.com/news/ci_3128087 indicates four tandems
hit?! ) in the area. The articles are primarily focusing on
the impact
to E911 services, followed with the hit to POTS lines. I have yet to
see any mention of impact to data in any of 'em. Here's what
intrigues
me about this outage: if it wiped out E911, most of the POTS and also
impacted data services (as Jay Hannigan and I can attest), how did the
cell towers that are also served by the network live through it?

The dependancy between all of those would be a DACS so that
seems to make sense. I'm guessing the impacted circuits were
DS3 or below, with Verizon providing resale of the Z ends.

I'm not sure of the relation to E911 though. Could be, but
it sounds odd since E911 has redundancies to tandems IIRC.

My guess is water on a DACS bay or complete power loss in the
CO (rarer than water on a DACS).

-M<

Having grown up two blocks from said CO; I can attest the power setup
is very, very well built out. Not to say even the biggest, well
engineered power plants can't fail spectacularly; but this isn't a
tiny CO by any standard.

regards,
aaron.glenn