This forum includes tips for maintaining the best audio quality possible with the Ooma System. If your Ooma system is having issues with dropped calls, static audio or echo, look here for assistance.
#16163 by blakelyb
Sun Aug 16, 2009 9:14 pm
Brief power failures seem to be common. It has happened 2 or 3 times in the last two weeks. Please suggest a good value for UPS for an ooma application.

Some info at http://www.vonage-forum.com/ftopic1382.html Thanks for any replies.

This looks good for $40 : http://www.officedepot.com/a/products/2 ... erralID=NA I bet they suck up power 24/7 like a DVR. I am guessing, 20 to 30 watts?

I ordered this for $45 + tax: http://www.officedepot.com/a/products/2 ... -180-Watt/ seems to use less power on standby, but has less power stored too. I'll report back after I try it.

PS: if you search ooma forums for "UPS" you will get no hits, even though they exist.
#16333 by bc3tech
Tue Aug 18, 2009 7:07 am
blakelyb wrote:Brief power failures seem to be common. It has happened 2 or 3 times in the last two weeks. Please suggest a good value for UPS for an ooma application.

Some info at http://www.vonage-forum.com/ftopic1382.html Thanks for any replies.

This looks good for $40 : http://www.officedepot.com/a/products/2 ... erralID=NA I bet they suck up power 24/7 like a DVR. I am guessing, 20 to 30 watts?

I ordered this for $45 + tax: http://www.officedepot.com/a/products/2 ... -180-Watt/ seems to use less power on standby, but has less power stored too. I'll report back after I try it.

PS: if you search ooma forums for "UPS" you will get no hits, even though they exist.

I have been trying to find a good one for my Ooma as well, as my modem & router are both on a battery backup, but ooma is located elsewhere. My problem is all the battery backups out there are too large! My ooma sits in my kitchen next to the phone, and I don't want a "dictionary" sitting next to it that i'm using only one or two outlets on! The TrippLite one you cited is probably one of the smallest i've seen, but still too large for me. I may just have to come up with a way to mount/store/hide one to make things work. we'll have to see, but thanks for the links!
WayneDsr wrote:In the ooma forums any 3 letter search will come up with nothing.
Use google to search ooma. It actually works better.

Wayne

"how?" you ask?

use:
site:forums.ooma.com <search criteria here>

works on Bing as well :)
#16916 by blakelyb
Sat Aug 22, 2009 6:32 pm
I got the UPS and tested it using a "Kill A Watt" meter by P3. http://www.p3international.com/products/special/P4400/P4400-CE.html

The UPS is Trip Lite ECO350UPS http://www.tripplite.com/en/products/product-series.cfm?txtSeriesID=685&EID=15454 Once the battery was charged it only consumed about 3 watts (5 VA, 0.62 PF) when nothing was plugged into it. When things were pugged in, it only used 3 watts extra. This is excellent and what I was looking for.

I tested it for power failure with 140 watt load (my computer and powered computer speakers) and the computer stayed running in Windows XP for about 8 minutes before it quit. An odd noise came from the vicinity of my computers power supply during this test. The noise was not too scary nor too loud, but it was a little scary.

I moved it to power my modem, ooma, and router. All those use only 15 watts without UPS and 18 wattsd with the UPS. I think this will reduce dropped calls on brief power failures.
#19295 by blakelyb
Mon Sep 07, 2009 10:30 pm
I measured as follows: (W=watt, VA = volt amps, PF = power factor)

ooma hub uses 6W, 13 VA, 0.48 PF
DSL Modem Motorola model 2210-02 uses 5W, 12VA, 0.46PF
SMC Barricade router uses 5W, 12VA, 0.46PF
TOTAL All 3 above use 15W, 22VA, 0.7PF, 60hz, 123 volts when house power was on.

I pulled the plug to simulate power failure, my ooma phone call stayed connected, and the UPS lasted for one hour and 44 minutes (1:44).

During this time the total load supplied by the UPS was 13W, 43VA. So the UPS did something that caused it to need much more VA (from 22 VA to 43 VA).
#19297 by murphy
Tue Sep 08, 2009 1:38 am
You appear to be using a Kill-a-watt to make your measurements. Most UPSs do not provide sine wave power. I've seen stepped sine wave and triangular waveforms. The ones that do provide sine wave power cost a lot more than those that are generally available. The Kill-a-watt was designed to make measurements of sine wave power. It's measurements under any other condition are not accurate.

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