I have BT broadband. I am almost computer illiterate so I might not be able to help.
I have a BT hub (not the Home Hub, which only has 2 ethernet ports, insufficient for us), which is connected to David's computer and the phone line in his room, and I have an ethernet cable which goes into the hub, as does our network printer.
The hub then blasts out a radio connection, which serves the various laptops which float around here.
We have no USB connections.
I am on Option 3, the expensive tarriff, as my David uses a Mac and I use blonde Microsnot PCs.
My BT email address is myname@btinternet.com.
I think David has some sort of password hidden amangst the spaghetti in his room, to to which I have little access.