Dr.Dave· Super Moderator
The STBs are connected to the modem by either coax or Cat5. Since you are switching from Bell satellite, the coax should all be terminated in a central location. The installer should install an HPNA splitter that connects all the cables you will be using including the ones you will be installing yourself. Plugging in the additional STBs should be straightforward, providing the existing cable is in good condition and the proper splitter is used.