Patent ID: 8903248

Claim:
A transmission apparatus comprising: a data signal processor to add first data of a control signal to a data signal received, and transmit the data signal to other transmission apparatus; a first signal output module to output second data of the control signal; an update controller to control an update of a function included in the first signal output module; and a second signal output module, when a notice of an instruction for updating the function included in the first signal output module from the update controller is received, to output the first data of the control signal that is the second data of the control signal held in the second signal output module when the notice of the update instruction is received, wherein the second signal output module, when a notice of a completion for updating the function included in the first signal output module from the update controller is received, outputs the first data of the control signal that is the second data of the control signal received from the first signal output module updated by the update controller.