The BXM-155 is a multiport ATM OC-3c/STM-1 interface card that uses custom application-specific integrated circuit (ASIC) technology, for the BPX 8600 Series, to deliver the industry's most advanced and reliable ATM networking features. It Supports PVCs, SVCs, S-PVCs and MPLS LVCs (label VC). It provides redundancy protection for card as well as line via SONET/SDH Automatic Protection Switching (APS). Its high-speed connectivity takes ATM to new levels of efficiency and scalability.