The thread started with:

In the event of power cuts, will xDSL lines still provide signal to the router?

Assuming the property has a battery backup, and the router is powered up.
With POTS we knew the line was 'always on' for voice calls.

But will ADSL or FTTC connections work?

Re the first sentence/question: Yes, they always have done. With the caveats about the Openreach infrastructure backups that have now been discussed to death. With very informative input from yourself .

If those backups involved fail nothing works.

"Assuming the router is powered up". Answer, no need to assume that. ADSLx and VDSL2 are always on. Even if the router is not powered up they are still present at its input port.

"With POTS ...". It still is.

"But will ...". See first answer above,

The OP we now know is on an EO line on ADSL2+ with a backup power supply. Stuff that has been talked about umpteen times since ADSL and later FTTC were introduced.

He has been on this forum for over fourteen years so surely must have seen all that, but even if we accept he had forgotten it then a simple question asking about his setup would have been quickly and easily answered like that.

The first and last sentences of the opening post are basically duplicates, and in my opinion suggested VOIP might be in the setup. It is. But in addition to the PSTN, not replacing it so not relevant.

As for your sentence in parentheses, I have never heard or seen it before. I don't think it was necessary.

In reply to a post by pluralist:

As for your sentence in parentheses, I have never heard or seen it before.

In the days of the Cold War it was the usual advice about what to do if you heard that nuclear missiles were on their way.

Power supply fault to the cabinet so its running on a generator until the DNO restore the AC supply

In reply to a post by witchunt:

Power supply fault to the cabinet so its running on a generator until the DNO restore the AC supply

It does seem like that but because of the security fencing it's impossible to see how things are setup electrically. Also I don't know how long the generator has been continuously running since I only pass that spot on occasional Sundays.

In reply to a post by kitcat:

Reading the last 3/4 posts made me think I had slipped back into a 1970s school days discussion. ( Tuck your head between your legs and kiss your Bum goodbye)

We're doomed Mr Mainwaring

I always thought it was Mannering but google says it Mainwaring

Edited by deleted (Sun 23-Oct-22 22:47:42)

In reply to a post by dect:

I always thought it was Mannering but google says it Mainwaring

Don't try Featherstonehaugh .

(Well - do try it before googling it)

You may be surprised how small the serious impact area of a nuclear explosion is - there is a "fun" tool at nuclearscrecy.com that I've spent quite a few hours playing around with.
I live quite close to Bristol, but a 50kt strike there would only rattle our windows, and depending on whether it is an air-burst or not even the worst-case radiation fallout probably wouldn't reach us as the prevailing wind would take it in the other direction.

The question is, does that site talk about atom bombs or hydrogen bombs. AIUI modern strategic nuclear weapons have hydrogen bomb warheads, measure in megatons of explosive power, not kilotons.

Kts are more applicable to the battlefield tactical weapons being worried about in the Ukraine war.

... the explosive power of the weapons mounted on strategic missiles usually ranges from 100 kilotons to 1.5 megatons. Thermonuclear bombs can be made small enough (a few feet long) to fit in the warheads of intercontinental ballistic missiles

A lot more information on another site, such as:

... approximately 35 percent of the energy of a nuclear blast is released in the form of thermal radiation. Since thermal radiation travels at approximately the speed of light, the first thing that will hit you is a flash of blinding light and heat.

The light itself is enough to cause something called flash blindness – a usually temporary form of vision loss that can last a few minutes.

The AsapSCIENCE video considers a 1 megaton bomb, which is 80 times larger than the bomb detonated over Hiroshima, but much smaller than many modern nuclear weapons.

For a bomb that size, people up to 21 km (13 miles) away would experience flash blindness on a clear day, and people up to 85 km (52.8 miles) away would be temporarily blinded on a clear night.

Heat is an issue for those closer to the blast. Mild, first-degree burns can occur up to 11 km (6.8 miles) away, and third-degree burns – the kind that destroy and blister skin tissue – could affect anyone up to 8 km (5 miles) away. Third-degree burns that cover more than 24 percent of the body would likely be fatal if people don't receive medical care immediately.
...
Within a 6-km (3.7-mile) radius of a 1-megaton bomb, blast waves would produce 180 metric tons of force on the walls of all two-story buildings, and wind speeds of 255 km/h (158 mph). In a 1-km (0.6-mile) radius, the peak pressure is four times that amount, and wind speeds can reach 756 km/h (470 mph).

Technically, humans can withstand that much pressure, but most people would be killed by falling buildings.

I very much doubt that your prevailing wind would be important even a few more miles away .

AIUI modern strategic nuclear weapons have hydrogen bomb warheads, measure in megatons of explosive power, not kilotons.

Kts are more applicable to the battlefield tactical weapons being worried about in the Ukraine war.

Yes, 50kt is towards the top of a tactical nuke yield, and the very bottom for a strategic nuke. However, even for a 5Mt blast, I'd be outside the 3rd degree burn radius. However, I don't think even Bristol would be enough of a target for a 5Mt bomb - Russia only has about 1500 warheads available at short notice, so they'd have to be picky.

I very much doubt that your prevailing wind would be important even a few more miles away wink.

Actually, it depends on the altitude of the detonation. For maximum damage radius an air-burst is best, and produces relatively little radioactive fallout - while a ground burst produces the maximum fallout.

Anyway, the size of my UPS would be relatively unimportant!

My original post was about being 11 miles from Manchester. Even if I survived a strike there, my social life revolves mainly around the classical music and theatre venues there. Also the BBC Philharmonic based in the Media Centre in Salford would go, as that Centre would not exist and the Lowry Theatre and Art Gallery next to it with the largest collection of Lowry paintings in the world would be devastated.

Edited by pluralist (Mon 24-Oct-22 22:01:05)