The Enhanced BXM cards improve the current BXM cards by delivering even more cost-effective ATM switching and traffic management. The Enhanced BXM cards come in EX and DX versions featuring additional benefits. The cell memory has been increased on the Enhanced BXM cards to support even greater cell buffering to maximize bandwidth efficiency and cell/frame throughput in wide area networks. Enhanced BXM cards support up to 12 ATM interfaces per card at speeds from T3/E3 to OC-12/STM-4. The ACP processor memory is quadrupled and the flash memory is doubled to 4 Mbyte on all Enhanced BXM cards to allow more headroom for feature addition and enhancement in the future.With a more powerful processor and more VC configuration memory in ATM cell switching subsystem, the EX and DX versions of Enhanced BXM cards meet the ever increasing demand for greater number of connections per interface. For each PVC terminating on the card, Enhanced BXM supports a full range of stats for usage-based billing at cell and frame levels, cell policing, EFCI marking, ABR RM cells, and OAM cells. Supporting a greater number of connections per interface translates to supporting a greater user density more cost effectively.