Patent ID: 8682162

Claim:
A return path for RF-modulated video service control signals comprising: a subscriber optical interface for receiving upstream RF-modulated video service control signals in the electrical domain, the subscriber optical interface comprising an RF diplexer, the RF diplexer comprising a first RF filter for passing the upstream RF-modulated video service control signals in the electrical RF domain and blocking any extraneous RF-modulated signals, the RF diplexer comprising a second filter for passing downstream RF-modulated video signals in the electrical RF domain and blocking any extraneous RF-modulated signals, the first RF filter having an output port coupled to an input port of an A/D converter, the A/D converter for converting the upstream RF-modulated video service control signals to digital signals, the subscriber optical interface modulating an optical carrier with the digital signals for generating optical signals according to a timing dependent protocol and which are sent upstream relative to the subscriber optical interface.