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United States Patent | 5,299,293 |
Mestdagh , et al. | March 29, 1994 |
A protection arrangement protects an optical transmitter device with n optical transmit circuits or an optical receiver device with n optical receive circuits. It includes fault evaluating circuitry to detect a defective transmit/receive circuit, a spare transmit/receive circuit, and switching circuitry. Upon detection of a defective transmit/receive circuit by the fault evaluating circuitry, the fault evaluation circuitry controls the spare transmit/receive circuit and the switching circuitry to bypass the defective transmit/receive circuit with the spare transmit/receive circuit.
Inventors: | Mestdagh; Denis J. G. (Brussels, BE), Van de Voorde; Ingrid Z. B. (Dilbeek, BE) |
Assignee: |
Alcatel N.V.
(Amsterdam,
NL)
|
Appl. No.: | 07/857,572 |
Filed: | March 27, 1992 |
Apr 02, 1991 [BE] | 09100303 | |||
Current U.S. Class: | 398/24 ; 370/221; 398/2; 398/23 |
Current International Class: | H04B 10/00 (20060101); H04B 010/08 () |
Field of Search: | 359/110,117,125,128,133,157,161,177,187,194 370/16 375/38 371/8.2 |
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4696060 | September 1987 | Oswald |
4887309 | December 1989 | Andersson et al. |
5091796 | February 1992 | Nishimura et al. |
2598573 | Nov., 1987 | FR | |||
2233851 | Jan., 1991 | GB | |||
Wu et al., "Decreasing Survivable Fiber Network Cost Using Optical Switches", GLOBECOM '88, IEEE Global Telecommunications Conference & Exhibition, Conference Record, pp. 93-97, vol. 1, Nov. 28-Dec. 1, 1988. . DIALOG English Language Abstract of FR 2 598 573.. |