Thanks for your post and welcome to the Community Forums, philippetrou
The hubs should come with the adapters, however the landline feature is not switched on by default, You will have to ring the team to have your landline services converted to DOCSIS connection, at that point they can also get an adapter sent. You can reach the team by phone 0345 454 1111[calling 150 from a VM phone line is free]
Cheers,
Corey C