BT4600 phone compatible fttp

[bainmick]

Are BT4600 phones compatible with FTTP modem. If so is there anything apart from connecting them to modem i need to do

[Jayach]

Absolutely no reason why they wouldn't be.

You may need to replace the phone lead with the cable marked "internet" in order to make the connection (The socket on the router is RJ11). Or get one of these: 

https://www.amazon.co.uk/Rhinocables®-Socket-Telephone-Adaptor-White/dp/B00EVS5UZ2/

Cheaper versions may be available elsewhere.