The Cisco PXM-45/C Processor/Switch Module for the Cisco MGX 8880 Media Gateway, MGX 8850 and MGX 8950 IP + ATM Multiservice Switches is a combination of ATM switching fabric and processor card. When used in the MGX 8850 or MGX 8880 chassis, the PXM-45/C provides for a 45 Gbps non-blocking switch-fabric and a 1.2 Gbps cell-bus. The switching fabric of the PXM-45/C card is disabled when used in the MGX 8950 chassis. The XM-60 cards, which can be plugged into slots 9, 10, 25, 26, provide the switching-fabric function in the MGX 8950 chassis. The processor portion of the PXM-45/C provides the control and data planes that deliver IP+ATM networking software, shelf management activities such as diagnostics, and performance monitoring.