Hi
I think you've had your answers already, I'm not aware of any other options.
1) Keep (and pay for) a separate landline and keep voice as is until around 2025 when it will be turned off anyway.
2) Get new kit and sign up for VoIP from one of several suppliers and get the number transferred.
3) Do away with the landline and use a mobile for calls. (This will be the main choice I think for most come 2025)
Some ISPs may include the VoIP hardware in the router, which enables the plugging in of a standard phone line avoiding the purchase of new VoIP phones, but will still need setting up. Some people just will not like the extra complication and lesser reliability of a landline over the Internet, those same people are probably going to also dislike having holes drilled in their walls and boxes permanently fixed and plugged in for the fibre electronics in addition to wires and a router plugged in.
I can understand you are trying to remove that particular hurdle for people moving to FTTP to get everyone on side for the community scheme, however for some (certainly an older generation) they will not like or understand why they should lose their phone line. You may also need to factor in issues regarding any remote monitoring over the phone line such as burglar alarms, as they may not work correctly over VoIP.
This is going to happen to us all by 2025, but I suspect by then there will be many more options and it will just be plug and talk.
Personally I would push VoIP and recommend a supplier, then do some tests and type up some instructions along with some tested hardware choices, and maybe be prepared to help some people out as long as they go with what you know which means you'll be familiar with the kit and it will be quick to do for you. Some positives, if people are using the same VoIP supplier calls between them are completely free with no monthly subscription required, and they don't need to worry about it when it happens for everyone else in 2025.
Regards
Phil
