This was an unexpected surprise: My 10804 DVR can connect to IP cameras, so I currently have 6 channels on my 4-channel DVR. Amcrest should advertise this feature better.
So far, the extra IP channels are only working with Amcrest IP cameras.
Anyone have any success adding Foscams as IP channels to their DVR? I've entered the IP address and port, user ID, and password, but no connection (yet).