Alarm control system and method

Details Alarm control system and method Alarm control system and method

2006-06-27

2006-06-27

Leung, Christina Y. (Department: 2633)

Optical communications

Diagnostic testing

Fault location

C398S033000

Reexamination Certificate

active

07068931

ABSTRACT:
An alarm control method allowing easy localization of a failure in an optical communications network is disclosed. An optical signal from a signal transmitter is monitored to produce an alarm information signal indicating whether the optical signal is normally inputted. The optical signal and an optical control signal including the alarm information signal is multiplexed and transmitted to an optical receiver through an optical transmission line. When receiving the optical control signal and the optical signal from the optical transmitter, the optical receiver determines whether the optical signal is normally received. When not normally received, transmission of a receiver-side alarm signal to a management system is controlled depending on whether the alarm information signal indicates that the optical signal has been normally inputted at the optical transmitter.

REFERENCES:
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patent: 5995256 (1999-11-01), Fee
patent: 6081359 (2000-06-01), Takehana et al.
patent: 8-223253 (1996-08-01), None
patent: 9-36827 (1997-02-01), None
patent: 10-210008 (1998-08-01), None

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