Branching unit for an optical fibre transmission system

Details Branching unit for an optical fibre transmission system Branching unit for an optical fibre transmission system

H - Electricity

04

B

H04B 10/12 (2006.01) H04B 3/44 (2006.01) H04B 10/00 (2006.01)

Patent

CA 2217323

A branching unit for an optical fibre transmission system has a pair of inputs/outputs for receiving an end of a different section of trunk cable of the type having an electrical conductor and one or more pairs of optical fibres. A switching circuit (8) is effective to selectively route power between the electrical conductors (54, 56) of each trunk section or via an earth return (72) in response to a supervisory signal provided on the trunk.

Une unité de dérivation, pour un système de transmission par fibres optiques a une paire d'entrées/sorties pour recevoir une extrémité d'une section différente d'un câble interurbain du type ayant un conducteur électrique et une ou plusieurs paires de fibres optiques. Un circuit de commutation (8) permet de diriger sélectivement le courant entre les conducteurs électriques (54, 56) de chaque section interurbaine ou d'effectuer un retour par la masse (72), en réponse à un signal de surveillance produit sur le câble.

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