cordless phone not able to make contact with anyone

[nigkil]

as the title says - fibre installed 16/10 - since then no contact with anyone in or out (not even sky - phone just rings) - require contact with Republic of Ireland on a regular basis 

[Mark39]

To confirm - you're in the UK?

Is your cordless base station plugged into your broadband Hub?  Do you have a black Hub or white? Did you move to Sky Fibre from BT?