nanog mailing list archives
Re: "They all suck!" Re: UPS failure modes (was: fire at NAC)
From: David Lesher <wb8foz () nrk com>
Date: Thu, 29 May 2003 21:59:38 -0400 (EDT)
Speaking on Deep Background, the Press Secretary whispered:
On Thu, 29 May 2003, Sean Donelan wrote:
The most annoying thing about UPSes is they fail at exactly the time they are needed most.
....Like tape drives..
ok, what UPSes do telcos use (besides their monster battery arrays) -Dan
They eschew same. Telco stuph runs on that -48v. It's their steak & potato...err E. But the price is high and not just the cost. A telco string stores enough to qualify as weapons of mis destruction. Drop a wrench and learn Braille. You need a PE with a track record in battery plant design. You need a separate room, separate ventilation, separate entrance, etc. But your MTBF is many years. Yes, you lose individual loads, but the string carries on. Provided, of course, you keep the rectifiers running, and know when they fail...and fix same. (ATT NYC Toll switch and DACS...) -- A host is a host from coast to coast.................wb8foz () nrk com & no one will talk to a host that's close........[v].(301) 56-LINUX Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433
Current thread:
- Re: "They all suck!" Re: UPS failure modes (was: fire at NAC), (continued)
- Message not available
- Re: "They all suck!" Re: UPS failure modes (was: fire at NAC) Kevin Day (May 29)
- Re: "They all suck!" Re: UPS failure modes (was: fire at NAC) Dan Hollis (May 29)
- Re: "They all suck!" Re: UPS failure modes Jack Bates (May 29)
- Re: "They all suck!" Re: UPS failure modes Dan Hollis (May 29)
- Re: "They all suck!" Re: UPS failure modes Stephen Sprunk (May 29)
- Re: "They all suck!" Re: UPS failure modes Dan Hollis (May 30)
- Re: "They all suck!" Re: UPS failure modes Joel Jaeggli (May 30)
- Re: "They all suck!" Re: UPS failure modes Dan Hollis (May 30)
- Re: "They all suck!" Re: UPS failure modes bmanning (May 30)
- Re: "They all suck!" Re: UPS failure modes Jack Bates (May 30)
- Re: "They all suck!" Re: UPS failure modes (was: fire at NAC) David Lesher (May 29)
- Re: UPS failure modes (was: fire at NAC) Gerald (May 29)