The Role of the Wideband Digital Cross-connect System in Survivable Ring Networks

摘要

The dual-node interconnected ring topology has been accepted as the most survivable building block upon which to build high availability telecommunications services.Dualnode tings provide end-to-end traffic protection,utilizing principles of ring protection and dual service access to achieve fast restoration for both facility and nodal failures.The Wideband Digital Cross-connect System(W-DCS)plays a crucial role in support Of the dual-node interconnected ring,whether the interconnected rings are Unidirectional Path Switched Self-healing Rings(USHR/P)or Bidirectional Line Switched Rings(BLSR).This paper describes the functionality of the W-DCS in both unidirectional and bidirectional interconnected rings.and compares the economics of W-DCS and non-W-DCS approaches.