Cisco Systems, the worldwide leader in networking, 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 24 CT1 trunk card provides physical termination for as many as 24 T1 lines and connects to an external network termination (NT1) device.