Can I just say, completely irrelevantly, and somewhat reverentially, how
very educational many OT threads can be?

As he who started a little side-track with his 'phone being dead, but the
Internet still live - after those two weeks of frustrating arguments with
PlusNet's Customer Services, a Techie cured my fault in a matter of
minutes. I had always rather assumed that the fault was corrosion of the
copper-plated steel wire because the Hook Switch did not cause the dialing
tone to be produced. I had not given a thought to the various frequencies
and capacitative jumping potentially being involved, but just assumed that
the caused resistance interfered with the Exchange knowing that the
handset had been lifted, but the very low powered Internet signal remained
unaffected.

So thank you all :-)

In message 
          The Natural Philosopher  wrote:

> On 23/12/2020 22:57, Deloptes wrote:
>> Ahem A Rivet's Shot wrote:
>>
>>> When I had FTTH installed here the first thing they did (after
>>> erecting a couple of poles) was run copper to the house with a POTS
>>> service on it, then a week or so later another crew turned up and
>>> installed the fibre. The POTS service is active but never used. It would
>>> make a lot more sense if the fibre termination was powered by the 50V on
>>> the POTS line but it's powered by being plugged into the mains.
>>
>> May be I am understanding something different under POTS than you guys.
>>
>> Plain old telephone service, or plain ordinary telephone system, is a
>> retronym for voice-grade telephone service employing analog signal
>> transmission over copper loops (Wikipedia)
>>
>> Notice "analog signal".
>> Even if you have copper the last 50m or 3km - it does not mean it is POTS on
>> it.
>> It could be somewhere still a POTS - I never bothered to find out which
>> operators are using what switching technology. I worked with operators in
>> 12 EU countries with 18mil+ subscribers and last 2 (analog) DMS100 were
>> decommissioned 5y ago. Most probably it is ISDN that you get.
>>
>>
> I have fibre to the premises AND it sill has a POTS analogue phone
> service in the copper pair that runs with the fibre....

> No premises in the UK that runs on *ADSL* does NOT have a POTS service
> on the same wires.

> They are due to all be phased out, it is true, but not just yet.
> How can you tell? Line crackle. VOIP does not *crackle*




--
Mark J
From RISCOS 5.28 on a BeagleBoard-xM and Raspberry Pi2B
- and Linux on a PandaBoard ES, Raspberry Pi3B+ and Pi4B

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