Optical Network Design and Implementation

MS-SPRing Configuration

There are two types of MS-SPRings: two-fiber and four-fiber. Two-fiber MS-SPRings share service and protection equally, but only two physical fibers are required. With four-fiber MS-SPRings, the nodes on both sides of the failed span perform a span switch and use the second pair of fibers as the new working route.

MS-SPRings share the ring bandwidth equally between working and protection traffic. Half of the payload bandwidth is reserved for protection in each direction. An MS-SPRing node can terminate traffic it receives from either side of the ring and is suited for distributed node-to-node traffic applications, such as interoffice networks and access networks. MS-SPRings allow bandwidth to be reused around the ring ...