Switch architecture evolution in SONET networks

The implications, and requirements of switching nodes of the 1990s are discussed, and an architecture which meets those requirements is presented. The architecture defines a multifunction network platform which flexibly and efficiently supports the full range of existing and emerging services and nodal functions. The platform will be based on a layered architecture which decouples resources, minimizing the reliance on assumptions regarding the nature of and interactions among the various resources. This can be achieved by distributing resources across the switch architecture using methods made possible by advances in computing and communications technology. With service-independent terminations, the introduction of new services as well as variations in the mix or use of services will be handled without reconfiguration of the physical terminations. This will significantly simplify the OAM (operations, administration, and maintenance) by allowing the elimination or automation of activities. It will also enable service providers to implement new services, features, and network functions in a responsive and cost-effective manner