Decided to clean up my rat's nest of an Entertainment center. The Ethernet was major contributor. Switch going to TV, CCK, AVR, BD. the Apple TV was already WiFi. Found and installed the WiFi dongle that came with the the LG TV. I'll buy a dongle for the AVR. Don't care if the 4 year old Blu-ray has net. Removed 3 cables and a wall wart for the net switch. What does the CCK do? All I have is one HR-34 and 1 H-25 in the bedroom. Bypassed the CCK, plugged the coax and cat5 from the router directly into the HR-34. Fired up both receiver. It all works. I can play recordings from the HR-34 on the H-25. The iPad app sees both receivers. Removed a splitter, 2 coax, a CCK and another wall wart from the rat's nest. I got confused by all the threads over whether or not an HR-34 needs a CCK. I figured with my very simple setup I'd just try it.