Last week we had a service call to replace a defective HR-24 receiver. In the past DTV just mailed me a new receiver to replace a bad one but now with ATT you must have a service call. At any rate, the technician noted that our house was wired several years ago by DTV and needed updating . WE have 5 receivers in the house (various models) (3 are HR24'S) and they are wired to a Zinwell switch using all 8 outputs. Everything works (we don't use whole house) but he said we should have DTV install a SWM system along with all the new receivers needed and remove all of the old system except the wiring which could be reused in part.. Is this something that I will need in the future or was he filling the role of a salesman? Just curious..