On Thu, 6 Aug 2020 03:17:20 -0700 (PDT),
wrote:

If the POTS service moved to the ONT POTS port, what happens then?
Without some form of power backup you lose POTS service.

The trend is now to move POTS to the router, not the ONT. This means
that Openreach just support the ONT, and the ISP just supports the
router.

How does this fit with the PSTN switch off in 2025?
What if all you want is voice service, no broadband?

ISPs won't want to support power fail, ...

A (brief) google found that the "providers" should have at least one
solution that providees a minimum of 1 hour backup in the event of a
local power fail. This should be available for free to those "at
risk". The providers have an obligation to identify which of their
customers are "at risk" and communicate effectively with all
customers over the risks of local power failure and solution(s)
available.

... and they're even reluctant to support voice reinjection from their
router to home extension wiring.

Can't blame 'em for that. Remember Openreach only support to the test
socket on the NTE.

--
Cheers
Dave.