Haha....I don't know for sure, I don't work with that stuff, just the PC's, but yes, I do know that we can monitor any box or modem that's attached to your outlet and that your box has to have two way communication for your video to get through without a problem. I've heard some of the techs talk about problems on the return path causing problems and if this thing blocks the box's communication back to the cable system, you're just asking for trouble (viewing and legal).