The 3402 is a 3x4 multiswitch (I have a couple of them)...3 inputs (one being OTA) and 4 outputs
They will work in a LEGACY LNB setup. Dish Network only if its a single satellite setup (like for 119 or 61.5)
technically they will work with a DishPro LNB but for a SINGLE satellite spot only (you only use the V side)....cant use a DP Twin
what receivers are you using?