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Slow crash -> internet fail -> fast crash?
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kenneal - lagger
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Joined: 20 Sep 2006
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Location: Newbury, Berkshire

PostPosted: Mon Nov 05, 2018 2:52 pm    Post subject: Reply with quote

The television program that I saw on laying and joining underwater cabling made it look to be a relatively simple task in deep water so on the beach it must be a fairly routine procedure. There are a lot of old disused copper cables lying around West Country beaches so maybe it was one of those if no one was doing anything about it.
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careful_eugene



Joined: 26 Jun 2006
Posts: 505
Location: Nottingham UK

PostPosted: Tue Nov 06, 2018 12:27 pm    Post subject: Reply with quote

kenneal - lagger wrote:
There are a lot of old disused copper cables lying around West Country beaches so maybe it was one of those if no one was doing anything about it.

Really? I can't believe anyone leaves copper cable where it is unless it's very well protected.
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adam2
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PostPosted: Tue Nov 06, 2018 2:17 pm    Post subject: Reply with quote

Most data cables contain little copper and are not very attractive to thieves.
Power cables are much more likely to be a target.

The old fashioned telegraph cables contain relatively small copper cores together with a lot of near valueless insulation and armouring.
There are many abandoned cables of this type.

Newer fibre optic cables for LOCAL circuits contain no copper.

Long distance fibre optic cables DO contain a copper core, this carries electric power for the repeaters or amplifiers that are incorporated into the cable. Several thousand volts at a few amps is commonplace.

Abandoned telegraph cables if exposed on beaches are sometimes removed, for public safety reasons. Bare feet on the beach or when paddling in shallow water, and rusty bits of broken armouring wire are an unpleasant combination.

Modern data cables, if exposed are usually either re-buried, or enclosed in iron pipes. (these consist of two semi-circular channels that fit together around the cable. This protects against wear or accidental damage, but gives little protection against deliberate sabotage)

Abandoned power cables are usually recovered for the scrap value.
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Vortex2



Joined: 13 Jan 2019
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PostPosted: Sun Jan 13, 2019 4:51 pm    Post subject: Reply with quote

Re undersea cable : many/most come ashore undergound into secure sites.

One site is a large underground cavern.
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Vortex2



Joined: 13 Jan 2019
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PostPosted: Sun Jan 13, 2019 6:52 pm    Post subject: Reply with quote

I suspect that an Internet failure lasting more than say three days would be dire.

Losing access to YouTube cat videos is not the isue ... it's all the utilities who now use the Internet to replace dedicated leased lines which is the problem.

No cash, no tills, no petrol, no water, no phones, maybe no electricity, no food deliveries.

This sort of outage could happen relatively easily : a bomb or plane crash or fire or flooding in a certain key area of London would do it.
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adam2
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PostPosted: Sun Jan 13, 2019 8:39 pm    Post subject: Reply with quote

Yes.
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emordnilap



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PostPosted: Mon Jan 14, 2019 9:46 am    Post subject: Reply with quote

When a town gets a power cut, Aldi can’t sell you a generator.
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