> Certainly it would be reprehensible if the MAE-E core
> infrastructure (that which MFS owns/runs) wasn't backed up.
> However, I believe it is.
>
> I do not believe that it is the responsibility of MFS to provide
> power to individual's equipment that is co-located at the site.
If reliable power is not considered an essential part of facility
infrastructure, how would you suggest that tenants get it? I think
DC power is provided at all MFS facilities I'm aware of; the rub is
that most of our gear is AC. Does anyone know of inverters that take
MFS's -48dc (with what I'm told is 'positive-ground' power) and convert
it to 110vac? If not, we're probably going to have to build our own
battery rack and/or stick a generator on the roof at one of our MFS
colo sites.
that the incident at the WilTel POP in Santa Clara, CA, is sufficient
to prove that having individual tenants each supply their own
(typically small) UPS is a Bad Thing - the power was out long enough
to drain them to zero, furthermore (this part I have second hand) some
of them didn't take well to being flatlined like that. If everyone
were left to solve that problem on their own ... well, imagine
everyone jockeying to park their trailer-mounted portable generator
near the door. Yow.
Stephen
Avi
DC power is provided at all MFS facilities I'm aware of; the rub is
that most of our gear is AC. Does anyone know of inverters that take
MFS's -48dc (with what I'm told is 'positive-ground' power) and convert
it to 110vac? If not, we're probably going to have to build our own
battery rack and/or stick a generator on the roof at one of our MFS
colo sites.
Lorian Power Systems, Lorain OH. makes fine DC-AC inverters. I have 2
10kva boxes in my shop. Turn 'em on and forget about it. They make
smaller ones down to 1.5kva. Watch MFS's power surcharges though.
Avi
Patrick J. Chicas
Ok, I am not opening the GraybaR Power & Protection catalog.....
Page 12-31 Square D Company
Modle# Power Raiting Input Output Dimensions
6154-02 500 VA -48 VDC 120/220/230/240 VAC 7x17x15
6114-02 1 kVA -48 VDC 120/220/230/240 VAC 7x17x15
6115-02 2 kVA -48 VDC 120/220/230/240 VAC 17.5x17x15
6224-02 3 kVA -48 VDC 120/220/230/240 VAC 17.5x17x15
Nathan Stratton CEO, NetRail, Inc. Tracking the future today!
Does anyone know of inverters that take
MFS's -48dc (with what I'm told is 'positive-ground' power) and convert
it to 110vac?
Yes; Topaz makes 'em, as does AT&T (bet they're private-labeling
someone else's gear though). I'd be surprised if Best didn't make
one; you could check with Exie as well, or just look through the back
of _Computer Telephony_ magazine.
---Rob
Interesting enough, many fire departments won't allow roof mounted
generators anymore because storing fuel along with it is considered
hazardous. We had an awful time getting our 250 kw generator installed
and ended up with it on the ground level next to the parking garage
with an integral fuel storage tank; it was the easiest to get permitted.
Also, if you have ever been to MAE-East, you might realize that one
particular tenant that is effectively "sub-letted" in the facility
would probably have a slim to none chance of getting such a thing
installed. I suspect the DC to AC inverters are best for folks to
try, but it would have been nice if MFS had addressed the issue in
a more effecient manner when the new facility was constructed.
Ed Morin
Northwest Nexus Inc. (206) 455-3505 (voice)
Professional Internet Services
edm@nwnexus.WA.COM