Art Todesco wrote in news:ijj941$bqu$1
@speranza.aioe.org:

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?



The UPS is probably switching in too slowly for the modem's logic
circuitry.

The need to restart the modem is a giveaway that it's losing power for the
tiniest moment, just enough for its logic to /begin/ to die, but not enough
for it to die /all the way/ and thus do a complete reset on the new power-
up.

I think you need a newer UPS.

--
Tegger