The Natural Philosopher wrote:

> 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*

I must agree with the frequency and broken wire as it makes sense if some
connector or wireing is loose or damaged.

Regarding the VOIP and TDM - it is also true. TDM replaced the analog
switches by keeping the analog signal to the customer. Then came NCS.
What I meant was TDM was decommissioned and even NCS being decommissioned in
favor of SIP.

Regarding power outages - don't know about Germany and UK, but Austria and
Switzerland have huge fines if the operators fail to provide emergency call
services.
So there are backup batteries for the switches and the lines. It is
trivial - the batteries take over until the diesel power generator turns
on.
The DMS100 had the batteries the size of a wall 50*4m. Compared to 4 Racks
for a SIP switches with double capacity of subscribers.

--- SoupGate-Win32 v1.05