We propose an integrated smart cable operation system and its architecture for the future cable network. In the proposed architecture, an application programs and various modules are loosely coupled using a cable operation system platform. We anticipate the task flows for the future optical cable network operation in order to realize the proposed system and architecture. Each task flow is broken down into "atomic tasks." The task flow can be changed easily by combining these atomic tasks. We use an object-oriented design for designing the cable operation system platform. As a first step towards the construction of the proposed system a pre-prototype system was constructed and the results are shown.

A high-density cable structure, containing fiber ribbons inserted tightly into slots, is proposed for a high-fiber-count feeder line. This paper describes theoretical and experimental investigations on the residual strain due to inserting ribbons into a helical slot in this cable. The residual strain caused by different insertion methods is clarified and a strain suppression method is discussed. Based on the results, 600-fiber cable is manufactured and the transmission and mechanical performances are confirmed to be excellent.

A new method for evaluating optical fiber strain in a bent cable is proposed. The method is applied to fiber strain measurement in an actual optical cable and is found to be effective.