When a Input Port of a specific Protocol is created in Project Settings: a) The input Port calls IDMXProtocol::RegisterInputPort. If the Protocol cannot handle the Input Port, e.g. because the network interface is not reachable, the protocol needs to return false. b) The Protocol should pass received DMX by calling DMXInputPort::SingleProducerInputDMXSignal to the Input Ports. Note: The Input Ports do the required filtering for relevant universes.