Infinity Modem PSU

Hi, can anyone tell me what voltage the power supply is on the infinity modem ?

Thanks.

In reply to a post by Going_Digital:

Hi, can anyone tell me what voltage the power supply is on the infinity modem ?

Thanks.

Input or output?

Output, I'm hoping it is 12v or less.

12V DC and fairly smooth, but there is some high frequency noise on it.

Excellent, thanks.

That means I should be able to use my 12v DC UPS with it.

Don't those Fibre cabinets use normal mains to keep them going? i presume the phone system itself still have it's own power supplies,.

What's that got to do with the power supply to the modem?

If the power goes off and the cabinets are using the same power, then broadband will be lost, so what is the point in having a UPS for a modem?

The FTTC cabinets have UPS, and in any case probably run off a different sub-station. Our sub-station is very close, the cabinet is 500m.

Edited by RobertoS (Tue 21-Jun-11 19:25:33)

Also power failure could be localised in the building or limited to one phase so the cabinet will still be working fine.

Last winter I kept my router working for a couple of days without mains power using the low-tech approach of a cable from a surplus HH2 power supply, a couple of crocodile clips, and a car battery.

Same battery powered an inverter for the laptop, too. We were sat watching iPlayer while everywhere for miles around was in darkness and under several feet of snow.

While the DC UPS idea has tempted me a few times, the 5-minute break while I lug an old battery in from the garage can be lived with.

I just happen to have a DC UPS sitting unused so it will be ideal for the task, like you say the modem will go for a long time on the battery.

In reply to a post by Going_Digital:

I just happen to have a DC UPS sitting unused so it will be ideal for the task, like you say the modem will go for a long time on the battery.

Not much use if the router and PC are dead though?

In reply to a post by Going_Digital:

I just happen to have a DC UPS sitting unused so it will be ideal for the task, like you say the modem will go for a long time on the battery.

Car battery of about 80Ah, Load of maybe 0.5A, should give about a week before the voltage drops too far. I suspect longer than that was on the cards, as most "12v" rated kit will work happily with a good bit less.

A sealed lead-acid battery of about 7Ah would do, and be a bit more acceptable in the living room.