I apologize if I'm asking something already answered. I searched without success. 1. If I want to run unsupported whdvr with just a single dvr and single hd receiver, can I run a hard ethernet connection between the two units without using a switch or router? Would it need to be a crossover cable? 2. If there is an AM21 on the DVR (and not on the other receiver), can the other receiver access live OTA?