How do I attach a dect phone to my 4g router?

[ACCB]

I got my new ZTE router on Saturday.

Still trying to find the best place for it to allow streaming with no pauses...

I also want to attach our (currently landline) phone base station, so we can continue to use the same phones. I have attached the base station with an adapter, but the 'phone' indicator on the front does not light. When I try caalling the number (of the sim in the router) there is no reply and no apparent activity on the router + attached phone.

Help welcome!

Thx,

ACCB

[sc1999]

Ouch! My village is exclusively fttp. All copper cables are no defunct so I would have no landline phone if I switched to 3 broadband. Time for 3 to have a rethink. There would be no point in switching if I also needed to pay BT for a landline. 3 needs to find a way for people to maintain their BT number, or am I missing something. 

PS: does this apply to other networks.