Abstract: A method and system for identifying logical loops in an Ethernet network may determine a number of nodes N and a number of links L between nodes. A number of rings R, including a number of major rings and a number of sub-rings for the Ethernet network may be determined. Specific formulas for the values for L, R, and N may be evaluated to determine when the Ethernet network includes logical loops.

Abstract: A method and system for identifying logical loops in an Ethernet network may determine a number of nodes N and a number of links L between nodes. A number of rings R, including a number of major rings and a number of sub-rings for the Ethernet network may be determined. Specific formulas for the values for L, R, and N may be evaluated to determine when the Ethernet network includes logical loops.

Abstract: A system provides more cost and bandwidth efficient utilization of a SONET network having both a Working path and a Protection path by using both communication paths to carry data. A system for communicating data over a Synchronous Optical Network/Synchronous Digital Hierarchy, the system comprises an Optical Line Termination unit operable to interface with a plurality of Synchronous Optical Network/Synchronous Digital Hierarchy communication paths, and communicate different data on each of the plurality of Synchronous Optical Network/Synchronous Digital Hierarchy communication paths.

Abstract: A method and system provides the capability to provision Dual Working mode service in a SONET network, while maintaining compatibility with existing SONET provisioning systems. In one embodiment of the present invention, a method for provisioning dual working mode in a Synchronous Optical Network/Synchronous Digital Hierarchy network comprises the steps of generating provisioning commands to provision a non-dual working mode of operation in the Synchronous Optical Network/Synchronous Digital Hierarchy network, modifying the generated commands to indicate to a first network element that dual working mode is being provisioned, and transmitting the modified commands to provision the Synchronous Optical Network/Synchronous Digital Hierarchy network.

Abstract: A system for intercommunicating data traffic provides the capability to connect external interfaces that use one third or less of the OC3 bandwidth capacity in a reduced bandwidth mode that reduces system cost, while automatically switching to the full bandwidth mode to allow connection to external interfaces that utilize the full OC3 bandwidth capacity.