Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1991-10-24
1992-09-22
Coles, Sr., Edward L.
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359114, 359124, 340531, 250551, H04B 1008, H04J 1402
Patent
active
051502437
ABSTRACT:
A method and apparatus for monitoring an optical network interface. Signals containing information relating to the functional state of an optical network interface are delivered to an operation center. An alarm information transmitting component converts electric alarm information signals generated at the interior of the optical network interface into optical alarm signals. The optical alarm signals are transmitted along an optical fiber to the operation center where an alarm information receiving component derives the alarm information from the optical signal. The alarm information is transmitted to the operation center utilizing an optical alarm signal having a wave length which is different from the wave length of the optical signal used for transmitting the terminal signal. The optical network interface and the remote stations are connected by an optical fiber cable, and the subscriber's terminal and the remote stations are able to transmit a terminal signal in each direction through the optical network interface.
REFERENCES:
patent: 4850045 (1989-07-01), Funke
patent: 4994675 (1991-02-01), Levin et al.
Coles Sr. Edward L.
Fujitsu Limited
Negash Kinfe-Michael
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