On 24/12/2020 01:36, Charlie Gibbs wrote:
> On 2020-12-23, Chris Green  wrote:
>
>> 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.
>>
>> Since the phone hanging on the end it still an analogue device
>> requiring 50v DC to ring then the last section *is* still POTS.
>
> Yes, but that power is now coming from a wall wart, backed up by a battery.
That depends on which country you are.

In the UK, we are only just rolling out fibre to the premises. And the
fibre has a copper pair alongside it to carry POTS,  and currently
although the fibre modem has a POTS port, unless you ask for that to be
enabled, it isn't. And they discontinued battery backup as well.

Fibre to the cabinet, always has analogue pots on the line as well - the
copper breaks at the cabinet and the analogue signal is connected back
to the local exchange

Obviously ADSL always has analogue down the last mile anyway. Since you
need copper back to the DSLAMS  the phone service is effectively 'free'
- you need to pay line rental to get the ADSL, and if you select a
decent PAYG package you wont pay extra to have a phone capable of
receiving calls. Having a phone line implies having a number and
connectivity to the phone network.


I documented my FTTP installation here

http://vps.templar.co.uk/index.php?album=FTTP%20installation

It is representative of what the latest UK connectivity looks like




--
"Strange as it seems, no amount of learning can cure stupidity, and
higher education positively fortifies it."

    - Stephen Vizinczey

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