Redundant (1+1) or non-redundant operationHot swap capabilityIntegrated, non-blocking, any-to-any STS-3, STS-1, and VT cross-connectSupports 155 Mbps and 622 Mbps backplane rates, refer to connections/compatibilitiesCentrally managed by the system controller moduleBridges all DCC channels between High-Speed (HS) and Mid-Speed (MS) interfaces and the SCM