The PXM1 is a combination ATM switching fabric, data processing, and ATM interface card used on the MGX 8230, MGX 8250, and MGX 8850 switches. The PXM1 module combines a 1.2-Gbps shared-memory switching fabric with integrated trunking at speeds up to OC-12. The switching fabric provides 1.2-Gbps of non-blocking switching capacity, while the processor provides the control plane that delivers the industry's most advanced IP+ATM networking software, diagnostics, and performance monitoring. The PXM1 module uses state-of-the-art application-specific integrated circuit (ASIC) technology, and high-performance processing to deliver the industry's most advanced ATM networking features.