| 摘要 |
In a passive optical network in which a plurality of subscriber equipments are connected to central office equipment via a star coupler, non-faulty subscriber equipments are quickly recovered from a communication failure caused by a faulty subscriber equipment. A control signal of wavelength lambda 2 is wavelength-division multiplexed with a main signal of wavelength lambda 1. Using the control signal of wavelength lambda 2, the subscriber equipments are selectively deactivated from the central office equipment, and based on the recovery state during the deactivation process, the faulty subscriber equipment is located and only the faulty subscriber equipment is deactivated. |
