You have little to worry about with regard to radiation from your modem.
You /may/ have problems with your neighbors or the FCC. All computer
devices emit some RF- you have a lot of stuff switching off and on real
fast inside these little boxes. If the modem has passed the required FCC
tests for a class (I forget which class number is involved) it should be
quiet, but a non-shielded cable between the modem and computer, or an
improperly configured phone line connector inside the modem can still
radiate noise. If you check the power rating on the modem's power
supply, that will give you an idea of the absolute worst case radiation,
and it is extremely unlikely you will get to 10% of that power level even
if the modem is really screwed up. Most of the power consumed by the
modem, like all electronics is wasted as heat.
I had a stand-alone auto phone dialer a few years ago that wiped out my
VHF scanner when it was plugged in (finding /that/ was a challange!), and
it turned out that I could suppress the noise by flipping the phone line
in that case. This doesn't always work, in fact some equipment won't work
if the phone line polarity is wrong.
IN any event, the documented health hazzards from radiation are largely
from "ionizing" radition- radiation of the proper wavelength and strength
that it can strip electrons from atoms. You TV set can do this, close
up, since improperly adjusted it can generate X-rays.
The phony hoopla a few months ago about cellular phones causing brain
cancer- in my experience those idiots babbling on a cellular in traffic
are already brain damaged to such a point that cancer would be an
Policies and opinions held by the employer of the undersigned
are not reflected in the views of the undersigned. Or anyone
else in their right mind, for that matter.
"Never attribute to malice that which can adequately be explained
by stupidity" (attrib: O'Hanlon's Razor)