Increasing demand for bandwidth-intensive services and wide-area network (WAN) connectivity requires that network administrators maximize the capacity and efficiency of network routers. Cisco Systems' High-Speed Serial Interface (HSSI) port adapters enables network administrators to leverage their investments in Cisco 7500, 7200, and Route Switch Processor (RSP) 7000 routers. This port adapter increases port density and enhances performance at the industry's lowest price per port.