On 2016-11-20, Jim Wilkins wrote:
"Larry Jaques" wrote in message
...
On Sat, 19 Nov 2016 18:03:36 -0500, "Jim Wilkins"
wrote:

"Michael A. Terrell" wrote in message
...
Jim Wilkins wrote:

[ ... ]

I still have my ASR-33 for the post-EMP Internet.


All that will be left is dead fiber optic cable.

I'm clinging to my guns, religion and copper pair. The telco
business
office wants me to switch to fiber but the repairmen understand why
I
don't.

Fat lot of good it will do you if an EMP nukes the rest of the
electronics which make our telephone system work now. But I grok
the
sentiment.

Do you really believe an EMP would be worse than the direct lightning
strikes modern systems survive daily?

http://aviation.stackexchange.com/qu...k-by-lightning

Well ... most aircraft these days are metal skinned, thus
shielded.

And EMP tends to do things like accumulate over long power line
runs, so what would be a fairly small pulse for say a mile of wire
becomes really nasty spikes for long power-distribution cables.

https://www.fas.org/sgp/othergov/doe...1/00322994.pdf

Lightning struck the pole across from my house in the 1990's and the
phone company had to replace the old carbon surge suppressor at the
service entrance but my cheap electronic phone was undamaged.

O.K. In contrast, I had a Frame Relay net feed and about once
every couple of years, a nearby lighting strike would zap more pairs in
the buried cable (in lead sheathing, but punched through by the high
voltage spikes. I always kept a spare frame relay modem on hand, and
the original went back to the maker for repair or replacement. I got
the original back before the next strike.

And, sometimes after that, I also had to pull out the
carbon/spark gap protectors, blow off any frayed dust and reinstall to
get noise out of the voice phone line.

About the time that the buried cable was replaced with newer
cable (vinyl around metal shielding, and dielectric grease in the wires)
and a forgotten stub going off several miles to another nearby city was
removed, I switched from Frame Relay to T1, and the modem was split into
two sets of electronics -- one where the old modem had been, and the
other a phone company owned set of electronics on the side of the house
at the service entrance. Since then, no lightning damage has been
observed. (Otherwise, I might be tempted by the FIOS (Fiber Optics)
service which they keep pushing. :-)

The phones themselves were (and still are) old Ma Bell sets,
which just keep working.

Enjoy,
DoN.

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