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There's the best one to use if you have 2-3 sb's and a couple of trango
units doing your backhaul. It's a 3-6 amp system The main chassis
that contains the rectifiers is 1U, and the batt's are about
3U.
All
power output is taken through the rectifiers, and the rectifiers are powerd
straight from the batt bus. The batt's are charged from the AC input back
through the rect.
Using
a 12 AH batt, and drawing 1 amp (enough to power two sb units eaisly) you'll get
11.3 hours, with a 7AH, you'll get 6 hours.
Now,
instead of using their case and batt's you could supply your own. It won't
have the same "intellagance" built into the unit, but it'll save you some money,
and you can stick bigger batt's on it. The unit also support hot-swap of
the PCU's so if you ever burn one out, your still good to
go...
Keep
in min, this isn't normal "data" datacenter stuff, but it's built for Telcom
stuff. It's going to be more expensive than going and getting an APC ups
from your local computer store, but APC is ment for server equipment and the
like. This stuff is NEBS compliant, which to those of you that's not
familure with that.... it's designed to goto hell and back and still keep on
working.
you
can tell by it's specs... Operating temp is -40*F to 149*F
Humidity 0-95% and Earthquake.... Zone 4.. It's FCC class B.. The SB
stuff is Class C as far as I know.. dosn't say on the
bottom...
which
btw.. has anyone looked at the FCC tag? The only part I don't like is
"Warning ! electromagnetic radation. Keep at least 20cm from human
body" Kinda something to keep in mind next time you have your messing with
your ant's with that 1watt amp on them.... :D
Who
makes the 48v UPSes?
Even cheaper... 12volt car batt, 12 volt charger with a trickle
charge capability.... :D
But they do make UPS's that spit out 48v DC with a normal utility
input... According to the PoE spec's, equipment is suppose to be
able to take 12-48volts... But SB would have to comment on if they
accually followed the spec's/RFC's.... :D
You can make one easy enough. Around $130-180. Look at altronix.com
for the 18-24vdc regulator/back/charger module ($45-75) get two 12v 7
amphour ($12 ea) or larger gel-cell or sealed lead-acid batteries and a
1200VA transformer ($60-80) and you are all set. This will charge the
batteries and regulate the voltage when AC is normal, back up to batteries
when AC fails and should run for 12-14 hours on batteries if you use the
7Ah ones.
I just want a 1400 UPS from APC that spits out DC. That way
we don't have to power the invertor.
These power condition as well... Their not the cheaper
UPS's you goto Best Buy and pay $100 bucks for. I have software
that I can look at the power level's from the utility, and from the UPS
plugs and see the diff.
-----Original Message-----
From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]On Behalf Of Tom
Haynes
Sent: Saturday, July 05, 2003 17:00
To:
[EMAIL PROTECTED]
Subject: RE: [smartBridges] Now have
45 customers on 1 aPPo
This does not pertain to your problem. Haveing an
average UPS does not eliminate spikes, surges and some sags. Only
ones labled as power conditioning UPSs do that (and the cheaper one
don't do it that well). When the average UPS is not on battery backup
it acts just like a surge supressor and must be rated to handle the
level of noise on your power lines.
Just an FYI
TO SMARTBRIDGES - Has any testing been done to see how a
non-sine wave AC source affects the units? Most UPS produce a modified
square wave or sawtooth AC wave and not a pure sine
wave.
Kinda sounds like something I came across a few weeks
ago....
Here on my desk, I have a aPP. It's always up and
running, plugged into a UPS and a network that has everything on a
UPS. (so no surges anyplace) Anyway, I upgraded the firmware
several several weeks back. (forget when exactly). I got home,
plugged in my laptop, slamed in my wireless card... and went no
where. I associated just fine, but I couldn't pass any
packets.
I got into simpleMonitor and looked at the ethernet stats, and
it shows packets being sent and recived. I reboot the AP...
reassociate... and it passes 3 packets, then dies... I went
aroun and around with it with reset's, fact resets, fw reloads... etc
etc... for about 2 hours.
And after messing with it that long, I finally got it to work
again. Kinda screwy if you ask me... something that's been
sitting here working for that long then all of a sudden does
that...
Well�thought I would keep everyone posted
on my numbers.
As of last weekend, we went from 30 to 45 units off a single
aPPo. I actually have 30 units directly off my head-end aPPo
(one of which is the repeater) and 15 more off the
repeater. The latest 15 are all
airBridges. We are pulling about 1.2 Gig per day
through the head-end (500 meg of which is from
the repeater clients).
1. I did the bulk
update with the latest simpleNMS and changed RTS/CTS and FRAG to
1496 and 100 on all client units (not
head-end). This was a pretty cool
feature. However, twice within 1 day ALLLL my units lost
association and I had to reboot my head-end aPPo to get them
back. So�needless to say, I
changed the RTS/FRAG settings back to default. No problems
since.
2. I used simpleDeploy to
burn ALL new customers. I then hot tested them for a minimum
of 24 hours prior to deployment with
none of them blinking an eye. Out of the 15 deployed, I have 3 units that are losing
association and not getting it back. I have had the customer
do a power reset by pulling the plug, factory default reset, etc,
etc�.but no luck. Oddly enough, one of the 3
units just came back online this morning with no
assistance. Pretty darn flakey! Note: all the
units could be pinged from the wired side and logged into (but DEAD
on the wireless side). Now I am going to go do some
climbing and replacing.
Side Note: My head-end aPPo which has been online since Dec
25th 2003 is going down hill quick. The
symptoms are this:
1. About 3-4 times a
week, the unit becomes unresponsive on the Ethernet side while
still passing traffic (hard reboot).
2. The RTS/FRAG
thing mentioned above really had me shaking in my boots (reset to
default).
3. I have been working with sB for a while on this
flakey aPPo, and I am now struggling with EC to get a replacement
unit before this one dies.
I think that sB is awesome. They are
VERY responsive and have even phoned me personally to resolve
issues. All my units previously deployed are working
wonderfully. 3 out of the latest 15 have not.
That doesn�t look good, but I am sure they
are getting to the bottom of it. Maybe it is a bad
simpleDeploy release??
Sully
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