Method and apparatus for failure recovery in passive optical net

Details Method and apparatus for failure recovery in passive optical net Method and apparatus for failure recovery in passive optical net

1997-09-23

2000-08-22

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359124, 359125, H04B 1008

Patent

active

061081124

ABSTRACT:
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..sub.2 is wavelength-division multiplexed with a main signal of wavelength .lambda..sub.1. Using the control signal of wavelength .lambda..sub.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.

REFERENCES:
patent: 5379278 (1995-01-01), Safadi
patent: 5864414 (1999-01-01), Barnsley et al.

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