Cisco 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 offers this T3/E3 card with 8 or 12 ports. Card can be configured for use in either network interface or service access (UNI) mode and with either a T3 or E3 interface.