SWM stands for single wire Multiswitch, and in most installations it resides in the LNB arm of the dish. The SWM creates eight "channels" in the coax and uses those channels to send independent signals to up to eight tuners simultaneously. You mentioned " no internet or other wacky stuff". Note that the connection of a Genie or other HD DVR to the Internet brings a nice package of free features that I personally use frequently. Connection to your router is a standard part of any Genie installation.
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