When there is a lightning flash close to any wire, buried or above ground,
there will be the risk of large induced currents, as a result of the huge
swings in the electro-magnetic field. To protect your equipment and your own
safety, you should disconnect your phone line as close to the MODEM as
possible. you should also disconnect the line at the socket where it comes
into the house. This will protect your phone equipment and filters. You
should also isolate your PC by unplugging at the mains socket. Ditto for TV
and Hi-FI equip. If you get a lightning strike on your house, the mains
wiring will probably all need replacing, plus anything connected to the
mains at the time (cooker, central heating ), but there is nothing
practicable that can be done to protect against that. Also, if you have roof
aerials, dishes etc, the down leads should be removed from their equipment.

--
Bernard Burton
Wokingham, Berkshire, UK.


Satellite images at:
www.btinternet.com/~wokingham.weather/wwp.html
"Tony Humphreys" wrote in message
...
Something I have only just thought about. Does anyone know if there is a
risk (as with regular modems) of damage during a thunderstorm to ADSL
equipment. I assume that there is but does anyone know differently (like
the microfilter will block this).