We recently moved office and the position where our telephone lines come into the building are in the opposite corner to where all our server gear is, including the UPS. I'm looking to have it so that our ADSL router is powered from our UPS in the opposite corner of the building, so that if the power does go off then our internet connection stays up long enough for the UPS to tell us about it.
I tried running the ADSL signal from the RJ11 connector on the filter through our Cat5E cabling to our patch panel and hooking up the ADSL router in our server cabinet but that didn't work consistently enough. We're only talking about 40m of Cat5e cable but I think the signal degradation was too much. And our ADSL speed is so bad out here on a business park that even losing a couple of Mbit is too much.
So I'm looking at the option of running power through the Cat5e cable. We already have a PoE switch which powers our VoIP telephones. Power for this switch is provided by the UPS. There's a spare PoE port and about 70W of spare PoE power capacity.
Obviously I don't have to use the PoE switch, I could use an injector/splitter instead and these passive ones look pretty interesting... http://linitx.com/product/11849
We have enough Cat5e wall sockets to be able to dedicate one for power and another for data - I'm not bothered about data and power sharing the same cable.
I have 2 different ADSL 2+ routers currently at my disposal and here are their power ratings.
A Thomson TG585v7 (BeBox) with an input of 22V 0.818A
Or a ZyXEL P-660H-D1 with an input of 12V 1A (10W max power consumption)
So I think there are 3 options:
1) use a spare port on the PoE switch and get a splitter for the ADSL router end
2) send AC mains current down a spare Cat5e cable and have the power adaptor at the same end as the router
3) have the power adaptor for the router connected to the UPS then the stepped-down (or up, can't remember my physics) current is sent over the Cat5e to go to a splitter which plugs straight into the back of the router
Option #1 needs the power requirements of the ADSL router to be PoE compliant. And as can be seen from the power ratings above, I don't believe either of them are.
Option #2 sounds fantastically dangerous.
Which leaves option #2 and one of these kits of passive injector/splitter... http://linitx.com/product/11849
Would that work?
I'd have to chop off the 3 pin plug end of a standard C13 computer "kettle lead" and add a 3 pin socket ( http://www.thetoolboxshop.com/0-722-00-pack-of-1-ful... ) so I can connect the ADSL router's power adaptor to a C14 outlet on the UPS.
Or should I just give up on the whole thing?