I have been pulling my hair out over a problem I traced back to the AM21. I have the DECA Whole home DVR setup (Was Hardwired) and was getting "Disconnected from network" error messages all the time when viewing a recording on another DVR. The problem was only occurring on my Living romm DVR. I swapped it out with my 3rd bed room dvr but the problem persisted. What was different I asked. THE AM21!!! I disconnected the USB cable from the AM21 and what do know, it works perfectly (4 hrs of playback no errors). Plug it back in and tried playing a recording and after 1.5 mins got the disconnect error. WHY??? My guess is that the USB port is right next to the Ethernet Port. With the USB streaming digital data from the AM21, it may be a noise issue causing corrupt packets on the Ethernet side (Just a Guess). I am going to try using the FRONT PANEL USB and see if the problems persist. and will update my post one way or the other. Just wanted to let the community know of another possible cause of flaky Whole Home Dvr use. Update: Using the FRONT USB port appears to have solved the problem. I have played back 2 recordings with no Disconnect errors while leaving the DVR tuned to a HD OTA channel.