| 摘要 |
PROBLEM TO BE SOLVED: To improve flexibility and reliability and to reduce laying costs by constituting a landing station of a central office having much traffic and a cable station having a little traffic, and connecting them through an integrated optical repeater cable. SOLUTION: The landing station is composed of a central office CO 80 for covering a main area with much traffic and a cable station CS 82 for covering the area with relatively little traffic. Further, all the CO 80 and CS 82 are mutually connected through an optical non-repeater cable 84, and the CO 80 are mutually connected through an optical light amplifying and repeating underwater cable 86. With such a redundant configuration, even when a fault occurs at the optical non-repeating cable 84 or the optical light amplifying and repeating submarine cable 86, that fault does not propagate to the entire network. Moreover, by defining the landing station having much traffic as the central office 80, the network can be constituted corresponding to the quantity of traffic and integrating the cable, the laying costs can be reduced. |
