The Cisco MGX PXM-1E Processor Switch Module for the Cisco Advanced ATM Multiservice Switch is a combination of ATM switching fabric and ATM interface and processor card. The PXM-1E provides flexible support of ATM interfaces and allows fast and efficient expansion of ATM modular optics.The Cisco MGX PXM-1E combines a 1.2-Gbps shared-memory switching fabric with integrated trunking at speeds up to 622 Mbps. The switching fabric provides 1.2 Gbps of non-blocking switching capacity, while the processor provides the control plane that delivers advanced multiservice networking software, diagnostics, and performance monitoring.