BT2200 showing unavailable

[Tray]

Both of my handsets are showing unavailable, does anyone know what this means. 

[JohnC2]

Hi Tray, sorry your handsets are showing as unavailable. 
Has this just started to happen or are you just setting them up for the first time?
Cheers

John

[Tray]

This is the first time 

[JohnC2]

Hi Tray, do you have a digital voice service or do you connect your phone the openreach phone socket?
If you have DV then you need to connect your phone to the phone socket on back of hub.
Here is the link to the user guide in case you don't have it and it may be of help to you. BT2200 Nuisance Call Blocker | BT Help

Cheers

John