Method of detecting breaks in multi-drop feeder systems

Details Method of detecting breaks in multi-drop feeder systems Method of detecting breaks in multi-drop feeder systems

1992-10-22

1994-08-02

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359124, 359166, 359168, H04B 1008, H04J 1402

Patent

active

053351045

ABSTRACT:
A passive distribution net connects a host digital terminal to a number of optical network units which service respective subscribers. Transmit and receive feeder fibers branch out to the optical network units with optical power splitters. An out-of-band laser light is blended with the communications wavelength on the transmit feeder at the host digital terminal and is stripped at the receive feeder using wave division multiplexers. Similar wave division multiplexers at the optical network units are coupled by an optical shunt to carry the out-of-band light around each optical network unit. This arrangement monitors network integrity and can discern fiber failure from optical network unit failure.

REFERENCES:
patent: 4555810 (1985-11-01), Khoe
patent: 4749248 (1988-06-01), Aberson, Jr. et al.
patent: 4775233 (1988-10-01), Kaneshi et al.
patent: 5078489 (1992-01-01), Lieber

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