I guess L175 gave us DPP support. If you have three satellites 110 119 and 61.5 as I do plus several recievers what do you need for a switch? I need to use one coax to a location where I want the 721 (very hard to run a second one). I currently have all Dish pro a dp twin a dp single and a couple DP34's what do I need to make this work at the single coax 721 location?