A reconfiguration method for fiber optic subscriber loops

Abstract

A fiber optic subscriber loop provides many services that require high quality for a large number of subscribers. This means that it is necessary to establish a highly reliable, economical subscriber network.A method for high-reliability network construction has been proposed. In this method, the amount of equipment is reduced by utilizing a fiber access module (FAM), which allows fiber lines between the adjacent loops to be connected in the optical subscriber loop. To realize the function of the FAM inexpensively, manual cross-connection is indispensable. However, the restoration time in the event of cable failure is quite long for manual crossconnection.This paper proposes a reconfiguration method, the selected node reconfiguration method (SRM), which has a shorter restoration time than the conventional method, assuming a manual cross-connection FAM. To further shorten the restoration time, a cross-connection method is proposed in which several fibers are switched at the same time. The efficiency of this method and the functional structure of the FAM will be shown.