I tried calling DirecTV tech support regarding this but they gave me mixed answers. My setup is as follows: Line coming in from dish to Swm power inserter into the Signal to IRD port Coax from Power to Swm port on the power inserter to the input on a 4 way swm splitter There are 4 lines connected to the outputs on the swm splitter. 3 go to individual receivers 1 goes into a 2 way Swm splitter (line coming from 4 way swm splitter to the input of the 2 way splitter) The output from the 2 way splitter (1 goes to a Deca and the other goes to an HD dvr) I have another room upstairs I'm looking to add a tv and box to. There is a coax line in that room but I realized that it's not connected behind the wall. My bedroom is across the hall from this room. I have a tv and dvr in my bedroom. After checking the cables for both rooms, it seems as though the coax from these 2 rooms were connected via a splitter at some point. It looks like the previous owner had cable. Since the cable for this other room was disconnected from the old splitter, can I add a swm splitter to get a connection to both rooms? My thought is to disconnect the line to my bedroom from the run to the basement 4 way swm splitter (they're connected with a union). Take the run from the basement and connect it to the input of an extra swm splitter a friend gave me. And connect the runs from the 2 rooms to the outputs of this splitter. Would this work? Or would I need to run a new line to the basement for the room with the disconnected cable? Any help would be appreciated. Thanks!