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

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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<