wrote
The Natural Philosopher wrote

The problem with phone by internet is when the internet
goes down either as a power cut or as a thing in itself.

And VoIP is fussy to set up.

Not with a decent voip service it isnt. The one
I used on the adsl2+ service was trivial to setup,
plug the preconfigured ata into the router,
plug the phone into that, all just works.

The one that came with the FTTC service was even
easier, new router, plug the phone into that.

I went a year with no VoIP on the phone but VoIP on
the tablet because of Sky's router not playing nicely.