Broadband Tech > General Questions > Size of UPS for router, cable modem, phone?

Size of UPS for router, cable modem, phone?

All of the upstream will be off so it won't work anyway...

That said, get whatever you can afford. Even a small one will support those devices for a good while.

reply to trparky
Almost any UPS should support that.

If your phone is VoIP then your cable modem probably already has a back up battery built into it. If the phone isn't cordless then you don't need to worry about power for it. If it is cordless then you can plug it into the UPS.

No matter what UPS you go with you shouldn't expect to actually use these devices for very long if the power goes out. Normal expected run times are from 10 to 30 minutes. UPS units are to cover for short power loss to allow you to properly shut down your equipment. If you want to actually use it you should be looking at a generator solution.
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reply to trparky
I have a 1500VA 900W 8 Outlets UPS.

Ref: »www.newegg.com/Product/Product.a···42102048

It powers a modem, router, switch & 1TB HDD. The run time states 83 min. with this load. With nothing to do while waiting for the electric to come back on, I have enjoyed being able to access the internet via my laptop.
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reply to trparky
That's basically my setup (cable modem, wireless router, cordless landline phone). I have an APC ES-550 and it runs for 1 hr 10 min.

reply to trparky
Last weekend I purchased new UPS. My old APC 1200 XS was getting a bit long in the tooth so I upgraded to a 1500 XS. I have my PC, monitor, wideband modem, MTA and cell phone charger plugged into the battery powered outlets and real world time is 32 minutes for all of my stuff.

»www.amazon.com/POWER-SAVING-BACK···6&sr=8-3

reply to LazMan

OK Here is the deal 10+ years supporting WIFI/broadband cable/Cellular/DSL/ Dialup

Cable fragged during power outages, No line amps to boost signal every x yards ... it is cost prohibitive to put power back ups on the lines to keep cable TV/internet VOIP, phones up and running during power outage.. (I worked for Time Warner Cable/Shaw/Rogers/Cox) So I know this.

Cel Service may work if it backs onto a POT system or Fiber Like ATT uses (again I worked for ATT too) Fiber more likely to have Back up power systems... ATT pays Huge penalties if they are down to long. Trust me I used to Wake VP's at ATT and TW at 3 am to let them know they have problems.

Bottom Line is Landline will function without UPS provided the phone unit itself does not require 110 AC to function.

Recommendation By a UPS that will last long enough to allow you to gracefully shut down your computer. And ride out the outage cause chances are your internet will be pooched anyway.

reply to trparky
Also keep in mind that the newer HP, Dell, etc. PCs won't work without a pure sign wave output. Check the UPS specs. The newer ones will have it but make cost more.

All I'm going to be putting on the UPS are those three devices; the Linksys router, the cable modem, and the phone modem. Nothing else will be on it, other than perhaps a desk lamp in case the lights go out for an extended period of time.
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Tom
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reply to dunworkin

reply to trparky
You need to ask yourself a few questions;

1) How long to do need to keep these devices powered up?
2) What is the power draw for the devices that will be connected?
3) You mentioned internet. Will you need to power a system to use the internet?
4) If so, what is the power draw for that system, including all devices like monitors, printers etc that need to have power?

Once you have those answered, you can go to the manufacturer's web site to find tables that tell you what size UPS you need to meet your requirements.

I prefer line-interactive UPS since those have faster transfer times than standby units do. They are a bit more expensive, but significantly less than on-line units.

See »en.wikipedia.org/wiki/Uninterrup···r_supply

and

»www.pcguide.com/ref/power/ext/ups/types.htm

reply to John Galt

reply to trparky
Wow, look at all the people who have to argue about stuff irrelevant to your question. Monitors? PCs? Pure sine wave? WTF?!?!

Consumer UPSes are sold by maximum output (VA), not battery capacity. But runtime is a function of battery capacity. So how can you determine the runtime? The good news is that larger capacity units usually have a bigger battery.

As I posted above, my 550 VA unit gives my modem+router+phone a runtime of about 70 minutes. Is that enough for you?

Avoid plugging in your desk lamp, as that will drain the battery faster than all your other devices combined. Get a D cell flashlight.

Go to these two links, set the power draw to 50W, and compare the runtimes:
»www.apc.com/products/family/inde···b=models
»www.apc.com/products/family/inde···b=models

Pick which works best for you. Note that higher output or more money does not necessarily mean a longer runtime.

reply to trparky

APC BE750G Power Saving Battery Back-UPS

Got that one. I may end up plugging a monitor into it as well since the one other UPS that's going to be near it is a bit overloaded.
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Tom
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That's not a bad deal. Just so you know, the size of the inverter doesn't make a difference on the run time, the size of the battery does. This uses a 12 7Ah battery and except for inverter efficiency changes, I'd expect it to run similar to other units with the same size battery. The good thing about that battery, when it's time to replace it, lots of places sell it, it's a common battery. Can even get a larger, 9Ah battery for a little bit more run time.

The router, modem and VoIP adapter will likely pull maybe 50-60W altogether. If you add in the monitor (LCD assumed) you could be somewhere around 100-150W depending on the specific monitor. APC's chart at 100W has that unit running for about 38 minutes and 22 minutes at 150W. It has a top end of 100 minutes at 45W (likely won't get any more run time with a lower load due to inverter efficiencies) and 2.5 minutes at it's max of 450W. So basically if you didn't have the monitor on there it would likely run the networking gear for about 1.5 hours.

reply to trparky