I am having an issue getting MOCA to work correctly... Room1 - internet router to Netgear MOCA device via ethernet (FIOS internet) Moca out to a 3 way splitter in the attic. At the Splitter: 'In' from cable TV supplier (Brighthouse cable supplies cable TV. Internet is via FIOS. 2 totally different systems) 'out1'- room 1 where it connects to the moca, so this is actually the moca in to the splitter. 'out2'- TV in room 2 'out3' at splitter goes to IN at moca device in room3. Out from the moca then goes to the cable box. TV works fine. so in effect, the moca in room 1 connects to the moca in room3 (thru a standard splitter), which then supplies internet to that room as well as cable for the TV. This works fine as long as the cable IN at the splitter is not connected (so no TV signal). But once that is connected, the moca's no longer talk. Seems to me like the IN from the cable TV system and the IN from MOCA1 are somehow interfering with each other and preventing the mocas from connecting. So, I am guessing here, but it seems there must be some sort of device installed somewhere to isolate the cable IN from the moca IN. The cable and the moca signal do travel on the same cable from the splitter to room 3. Can anyone give me some clues as to what I am missing?