Hi @gorrillabfg thanks for your post here in the Community, hoping you're well.
I do apologise, as I haven't noticed a specific question in point one so if I have missed anything please let us know.
In terms of your Father-in-Law, we'll be in touch to arrange an installation of a Hub solely for the purpose of providing the phone line, there won't be any broadband be available through the Hub and he won't be charged for this.
In terms of if there's a Hub failure, As our fibre phone line runs over our broadband network, it doesn’t have its own back-up power source. This means if there’s a local power cut or network outage, the fibre phone line will stop working and you won’t be able to make calls.
If you have accessibility needs or don't have a mobile phone, we’ll give you an Emergency Backup Line at no extra cost. This lets you call 999/112 emergency services during a power cut or network outage which may be what he needs.
For further info on the Emergency Backup Line, please see towards the bottom of the page on here.