Power cuts - a different take

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?

ADSL is exchange based so will continue to run until the exchange UPS/Generator provision is expended.

FTTC will run until the batteries in the cabinet are exhausted.

Thanks PhilipSmith72,
good to have confirmation before setting up plans.

In reply to a post by clyde123:

With POTS we knew the line was 'always on' for voice calls.

Until the exchange betteries ran down and te local diesel generator ran out of fuel.

In reply to a post by PhilipSmith72:

ADSL is exchange based so will continue to run until the exchange UPS/Generator provision is expended.

FTTC will run until the batteries in the cabinet are exhausted.

Or the home backup, as that is what keeps the router on for FTTC.

The OP also seems to me to be referring to VOIP/Digital Voice: ("With POTS we knew the line was 'always on' for voice calls"). Therefore the phone would also rely on the home backup. As it will for FTTP/H.

In reply to a post by PhilipSmith72:

ADSL is exchange based so will continue to run until the exchange UPS/Generator provision is expended.

FTTC will run until the batteries in the cabinet are exhausted.

Not sure all exchanges (especially some of the smaller ones) will have diesel backup. The bigger handover exchanges serving FTTP ought to have the longest autonomy.

The batteries in FTTC cabinets may only be good for 5 or 6 hours. Perhaps a lot less if they’re aged / not in great condition.

("With POTS we knew the line was 'always on' for voice calls").

I took that to mean ‘standard exchange based telephony’ Bob.

POTS Plain Old Telephone Service

Yes, so did I. But the fact the OP mentioned it as "in the past" suggested to me that they are either not still on it or are asking about when they aren't after 2025 .

Pheasant

All the exchanges have backup generators. There are a couple of 'exchanges' that are actually street cabinets so these will be the same as FTTC Cabs with batteries in.

The longest capacity was actually in the rural ones with a history of being cut off by bad weather.

Some generators in larger sites may be Gas so may have an issue in some circumstances,

Larger sites may have less headroom so may not be those that last the longest, they also have a history of only having short outages so are likely to have fuel supply for a shorter time.

There is also the issue that not all operators took backup supply when co-locating in BT exchanges so may not stand up during a power cut! (Risk versus cost equation may have changed recently!)

.

Thanks for the confirmation kitcat.

If we do end up having some form of extended and/or rolling blackouts this winter, it will really put whole systems to the test