Cisco is the worldwide leader in networking for the Internet. 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.Cisco's T1 and E1 frame service modules (FRSMs) offer high-density native T1/E1 frame service interfaces for the new world of data networking.