Selection of transmission facilities using optical...

H - Electricity – 04 – B

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H04B 10/02 (2006.01) H04B 10/00 (2006.01) H04J 14/02 (2006.01)

Patent

CA 2073994

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 isactive, 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.

L'invention est un système de transmission utilisant deux longueurs d'onde dans chacune de deux liaisons optiques, l'une des longueurs d'onde étant utilisée pour la transmission des données et l'autre pour la transmission d'un signal identifiant celle des deux liaisons qui est active. Chacune des liaisons optiques se termine par une unité d'émission et d'une unité de réception. Les deux unités d'émission déterminent laquelle des liaisons optiques est active, et chacune des unités d'émission émet ensuite un signal en utilisant la seconde longueur d'onde de la liaison pour communiquer cette information. La seconde longueur d'onde de la liaison optique active indique que cette liaison est active, et la seconde longueur d'onde de la liaison optique en attente indique que cette liaison est en attente. € la réception des informations transmises au moyen des secondes longueurs d'onde, les deux unités de réception choisissent la liaison optique active.

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