| 摘要 |
An optical network has a single cable (15) holding ribbon fibers (9, 11, 13) connected to line boards (1) in a station (7) for transmitting and receiving signals on the optical fibers of the cable. At a geographical location (3, 5) some ribbon fibers (9, 11) are cut off and a fan-out is made for both cut-off ends splitting the ends into individual fibers (19). In a branching point (at 3) having more individual cut-off fibers than subscribers the remaining cut-off fibers are connected through by fiber pieces (21), so that these fibers continue uninterruptedly through the branching point. Another branching point (at 5) has more subscribers than individual fibers in the cut-off ribbon fibers and then the subscribers are connected to individual fibers both in the portion of ribbon fibers close to the line boards and to the cut-off portions distant therefrom. At the end of the cable (15) suitable ends of the optical fibers are connected to each other through connector strips (23). In this way the capacity of the ribbon fibers (9, 11) can be efficiently used. The line boards (1) are each adapted to be connected to only one ribbon fiber. In order to allow a minimum number of line boards (1), at the head end of the cable two or more ribbon fibers (9, 11) can be connected to the same line board (1), so that the unused fibers in each of the ribbon fibers are not connected to any line board. When adding more subscribers to the network, a connector is removed, another line board (1) can then be added to the station (7) and the respective ribbon fibers (9, 11) are then connected to line boards (1) of their own.
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