Do UPSes protect from surges under this scenario?

void_at_no.spam.com
Date: 12/20/04 

Date: Sun, 19 Dec 2004 23:42:20 -0500

OK, under a typical scenario, you may have some equipment plugged into a UPS,
and when there is an electrical surge, it goes through the UPS's power cord to
the UPS and then gets stopped there. So it basically protects everything
"behind" the UPS from "outside" surges.

But do UPSes prevent surges that occur "behind" it from damaging other
connected equipment? Here's a scenario:

- some equipment is plugged into a UPS
- one of those components is a cable modem. (this is so that the cable modem
can still function during a power outage, as the cable line would still be
functional.) Let's say that the UPS does not have coax protection, so the
coax on the cable modem goes directly into the wall.

If a surge were to occur on the cable line (and this must be possible since
some surge protectors and UPSes offer coax protection), then it might go
through the cable modem, the cable modem's power cord, and then hit the UPS.
Would the UPS stop this surge from harming the other connected equipment?

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