Serial & asynchronous high-speed WAN Interface Cards (HWICs) provide highly flexible connections for Cisco 1800, 2800, & 3800 Series Integrated Services Routers. These HWICs help customers enable applications such as WAN access, legacy protocol transport, console server, & dial access server. You can mix & match HWICs to tailor cost-effective solutions for common networking problems such as remote network management, external dial-modem access, low-density WAN aggregation, legacy protocol transport, & high-port-density support.