| 摘要 |
<p>An OLT controller 90 makes each optical transceiver 21 transmit a search signal at a prescribed time so that the search signals reach all ONU connection ends of an optical transmission path 101. In the case where an ONU 10 connected to the ONU connection end of the optical transmission path 101 is unregistered, when the ONU controller 80 receives the search signal, the ONU controller 80 tunes a wavelength of an optical transmitter 11 of the ONU 10 to a wavelength corresponding to the search signal and makes the optical transmitter 11 transmit a response signal to an OLT 20.</p> |
