Obviously if you have ‘wired’ devices connected to any of the the Ethernet ports on the rear of the existing BT SH2 router , converting to FTTP won’t alter that , so if you have ( for example ) a smart TV , or a desktop computer wired to the hub, or devices plugged into powerline type adapters , that stays the same .
Currently your router will be connected to the copper phone line either at the ‘master’ socket or from an extension socket (that is connected to the master socket ) , when you get FTTP there is a ‘new’ device fitted , the ONT , this is mains powered and will connect to the WAN port on the SH2 router , the copper connection is no longer used.
Often the consumer will choose to have the SH2 router and ONT sited close to each other so a short Ethernet cable can connect them together , within reason , you can request where you would like the ONT to be fitted, it doesn’t have to be where the existing master socket is.
Unless you want to incorporate your existing phone sockets with ‘Digital Voice’ ( thats if you have chosen to take a phone service at all ) then the master socket may well become redundant and have nothing connected to it after you are on FTTP .
