JIMMIE wrote:
On Feb 17, 9:50 am, Art Todesco wrote:
I have a computer and DSL modem tied to an old UPS (with new
batteries). When I have a power failure, the computer keeps right
on ticking, but I always have to restart the DSL modem. I've even
restarted the modem while running on the UPS and after its restart,
all was fine. I am assuming here that the switch over time is
killing the modem. I looked at the modem and its walwart. It says
12 VDC. I was wondering if putting a few thousand micro farad cap
across the 12 volt line might help. Anyone have any experience with
something like this?

Run your modem directly off the UPS's battery..


I'd think twice before trying that. There's a good chance that the battery
voltage is floating far from ground.