Connect the modem to a wall outlet with a coax cable and plug the modem into an electrical outlet. Connect devices to the modem wirelessly, or with an ethernet cable to a LAN outlet on the modem. When ...
I've added a TV to my house and bought a 4-way splitter to put in the attic to provision it. The reception on that particular leg is craptastic, although all my other TV's seem to be doing OK.