Not all areas have been wired for fibre yet.
Once you are able to be converted your house will get a completely new line and your old phone line will cease to work, so your existing socket will be redundant.
Once the new line is installed, if your router is not vaple of running fibre, a new one will be provided and it's this you will plug your phone into.
Depending on the age of the phone, you may or may not need to purchase a new phone, but this will not be known until you are converted.
This article may help you understand the process.
https://community.talktalk.co.uk/t5/Articles/How-Full-Fibre-is-installed/ta-p/2555166
Please remember to mark Solved Posts with Best Answer. Doing so helps other customers and saves TalkTalk's Support Team time by only looking at unsolved topics. Thanks, Steve (a fellow customer).
