Just some feedback on UPS, PoE and runtime.
Configuration was 5 x Aastra 480i phones powered through a Netgear
FS116P 10/100 PoE switch.
We tried and APC Back-UPS ES 750 ($114) which ran for about 1hr 15mins.
Not long enough so we ordered a Tripp Lite Omni VS 1500 ($240).
The Trip Lite ran for an amazing 3hrs and 50 minutes! and has the
capacity to add an external battery pack for even longer run time.
We're going with the Tripp Lite for the first 4 clusters.
regards,
Drew
Peter MacFarlane wrote:
The Powerware units are fairly rugged (They go on ships and don't blow
up when power is disconnected from the port). You can use the sizing
tools on their site. We use three of them at the answering service.
The old one complains about power from the generator now. I'm not
sure what's wrong there. Battery packs can be plugged in for more
reserve.
Peter M.
Philip Mullis wrote:
The Netgear FS116P uses a total of 88watts (volts x amps=watts) under
maximum load so to figure out run time on ups use the following
equations.
First you need to get a load ratio by divideing the total va / watts
So an 1000va ups 1000va/88watts= 0.088 or rougly 9% load
Now if that ups lasts 10mins (take this from the mfgrs box and always
round down) under full load you would get the max run time looking at
the load and runtime under fully load
So in this case a 1000va would roughly get you 111 minuets (1hr 51mins)
Hope that helps out.
Regards,
Philip Mullis
________________________________________
From: Mike Ashton [mailto:[EMAIL PROTECTED] Sent: Monday,
February 05, 2007 1:04 PM
To: [email protected]
Subject: Re: [on-asterisk] UPS for phones at desktop
Drew,
I use the Ultra 1000kva units from TigerDirect, if you go to their
store they have (had it's been a few weeks since I've been there)
them as in store specials at $68, online their 107. They're hard to
beat for the price.
My most heavily loaded one will keep 5 small servers, a router and
two modems running for at least 35 minutes ( haven't test any longer
). So I imagine it would keep 5 phones and a switch going for quite a
while.
Mike
Drew Gibson wrote: I have to power groups of 5 Aastra 480i phones
plus a small PoE switch (Netgear FS116P) for 2-3 hours. There has to
be 1 UPS per group due to the office layout.
Has anyone found a low VA/ long battery life UPS at a reasonable price?
What are others using?
regards,
Drew
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