| 摘要 |
In order to provide an extended branch device in which construction work is easy and communication is not significantly affected by construction work, and a method for controlling the extended branch device, the extended branch device of the present invention is provided with: a first branch unit provided with a first port connected to a first terminal station, a second port connected to a second terminal station, a third port, a fourth port, and a switch for connecting the first port to the second or third port and connecting the second port to the fourth port; and a first separation unit provided with a fifth port connected to the third port, a sixth port connected to the fourth port, and a seventh port connected to a third terminal station, the first separation unit outputting, from the sixth port, an optical signal having a first wavelength among the optical signals inputted from the fifth port, and outputting, from the seventh port, an optical signal having a second wavelength among the optical signals inputted from the fifth port. The extended branch device is further provided with a second branch unit configured so as to be separable from the first branch unit. |
