| 摘要 |
[Problem] To provide an optical network unit (ONU) for P-P that can discriminate the type of a downstream signal corresponding to the construction of an optical access network and control an enable state of an optical transmitter Tx. [Solving Means] ONU 2A for P-P according to the present invention includes a bidirectional optical transceiver 11 that bidirectionally communicates with an optical line terminal (OLT), a signal-type discriminating unit 22A that discriminates whether a type of a downstream signal transmitted from the OLT and received by the bidirectional optical transceiver is for the P-P or not, and outputs an enable/disable control signal that controls an optical transmitter of the bidirectional optical transceiver to an enable state or a disable state in accordance with a discrimination result of the type of the downstream signal, and a control unit 21 that controls the optical transmitter to the enable state or the disable state according to the enable/disable control signal, wherein the signal-type discriminating unit 22A outputs to the control unit 21 a disable control signal that controls the optical transmitter to the disable state under an initial state before the type of the downstream signal is discriminated, and outputs to the control unit 21 an enable control signal that controls the optical transmitter to the enable state after the downstream signal is discriminated to be for the P-P. |
