On 24/12/2020 19:17, Axel Berger wrote:
> Kurt Weiske wrote:
>>   offers an internet/telco modem that
>>   provides dial tone. There's a spot in the modem to install a small
>>   battery backup,
>
> I'm afraid that's probably useless. Anyway UPS' exist and it would be
> easy to proviode the same externally in your home. Your backup may
> provide a nice flawless dial tone, but in a power outage it's the
> external line I expect to be down. You no longer have the direct
> uninterrupted wire to the phone exchange with its emergency power but
> rather many active amplifier boxes in between.
>
Well dont know what YOU are describing but in the UK it is NOTHING like
that.

ADSL goes directly  back to a local battery backed exchange. VDSL goes
to a street cabinet that I suspect is powered from the exchange,
although that MAY be mains powered. The phone line continues to the
powered exchange  My fibre to the premises requires no power and goes
they assured me 12 miles to the nearest TOWN without any electronics at
all. So all I would need to keep alive is my house network and the
optical modem.

But I still have powered copper and POTS although it costs me line
rental. I make less than ten calls a month so its payg. Mostly I use
email whatsapp skype or occasionally a mobile cellular call




So there are no 'active amplifier boxes' involved at all. Far too expensive!

The frame relay and or SONET backbone is also emergency powered orr
there  wouldn't be any point in keeping the phones up.

> I know very little about these things but the above is the gist of what
> I believe to have picked up. I may well be wrong.
>
>


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