Patent ID: 8417119

Claim:
A customer premises optical network unit for connecting an external node at a customer premises side to an optical transmission path connected with a central office, comprising: an optical transceiver unit to be connected with the optical transmission path for performing an opto-electrical transform and an inverse opto-electrical transform; an optical network unit function part to be connected with an electric signal input and output terminal of the optical transceiver unit; a serial/parallel transform unit to be connected with a parallel signal terminal of the optical network unit function part for performing a serial/parallel transform and an inverse serial/parallel transform; a multi source agreement interface module to be connected with a serial signal terminal of the serial/parallel transform unit; an indication unit for performing a predetermined indication at a time of inputting an indication request signal from the optical network unit function part; and a package for storing the optical transceiver unit, the optical network unit function part, the serial/parallel transform unit, the multi source agreement interface module and the indication unit, wherein a visual check part is provided at the package for visual checking the indication unit, and wherein the package is premised of an insertion part to be inserted into a predetermined slot of the external node and of an exposed part to be exposed outside thereof and comprising an optical connector, and the visual check part is provided at the exposed part.