Re: Thunderstorm ADSL experience

In article <waKdndshoqzHx__ZRVnytQ@xxxxxxxxx>,
ato_zee@xxxxxxxxxxx writes:

On 10-May-2006, "Martin" <martinw2k@xxxxxxxxx> wrote:

I was wanting to know if i can repair the
lightening damaged adsl modem that is built in to the router.

Unlikely, I looked after the comms for a University, and
accumulated a cupboard full of lightning damaged gear.
These were pretty well all unrepairable.
....
"What's a fast fuse with a 100 legs?" answer "An LSI package"

I had the same role at a University. Our asynch terminal switch in the
1980's was always getting its line cards damaged by lightning tickles.
Fortunately it was always the same component which took the hit - a
discrete transistor - which our technician could easily replace. I
asked him if we could protect the lines with a suitable fuse to stop
this happening. He sensibly replied, "What's the point? The transistor
seems to be performing that role quite effectively."

Perhaps this is now a suitable role for a cheap router - to stand in the
firing line of such nasties. Unfortunately you can't guarantee they will
offer much protection to what's behind them. When a house served by the
same telegraph pole as my house was hit by lightning a few years back,
it knocked out my ISDN router, a few random ports on an ethernet switch
behind that and on ethernet card in one of the PCs that was connected to
it. I felt lucky it went no further. The ISDN's only used for backup
now (main service: cable) - but ISDN line stays physically disconnected
from the router. I'll forego the luxury of automatic fall-back to ISDN,
to save the lightning striking twice!

--
Tim Clark
.

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