Cisco Systems is the worldwide leader in networking for the Internet. Cisco's Internet Protocol-based (IP) networking solutions are the foundation of the Internet and most corporate, education, and government networks around the world. Cisco provides the broadest line of solutions for transporting data, voice and video within buildings, across campuses, or around the world. Cisco solutions ensure that networks both public and private operate with maximum performance, security, and flexibility. In addition, Cisco solutions are the basis for most large, complex networks used by corporations, public institutions, telecommunication companies, and are found in a growing number of medium-sized commercial enterprises.The ATM dual PHY OC-12 LANE/MPOA module (SMF) provides one direct connection and one standby connection between the 622-Mbps ATM network and the Catalyst 5000 family switch using two single-mode (SC) fiber-optic connectors.