Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1991-10-02
1993-05-18
Coles, Sr., Edward L.
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359110, 370 16, H04J 1402
Patent
active
052125785
ABSTRACT:
A duplicated transmission system in which two optical wavelengths are utilized on each of a pair of optical links with one optical wavelength communicating data and the other optical wavelength communicating a signal designating an active optical link of the pair. Each of the optical links is terminated on a transmit unit and a receive unit. The two transmit units determine which of the optical links is the active optical link, and each of the transmit units then transmits a signal on the second wavelength of the terminated optical link indicating this decision. The second wavelength of the active optical link designates that it is active, and the second wavelength of the standby optical link designates that it is the standby optical link. Upon reception of the information on the second wavelengths, the receive units both select the active optical link.
REFERENCES:
patent: 4696060 (1987-09-01), Oswald
patent: 5069521 (1991-12-01), Hardwick
patent: 5077729 (1991-12-01), Wong
Grimes Gary J.
Helton John S.
Honea William K.
Peck Stephen R.
AT&T Bell Laboratories
Coles Sr. Edward L.
Moran John C.
Negash Kinfe-Michael
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