Cisco 2-Port Asynchronous/Synchronous Serial WAN Interface Card - Expansion module - HWIC - RS-232, RS-530, X.21, V.35, RS-449, RS-530A - 2 ports - for Cisco 1841, 1841 ADSL2, 1921 4-pair, 1921 ADSL2+, 1921 T1, 19XX, 28XX, 29XX, 38XX, 39XX

Serial and asynchronous high-speed WAN Interface Cards (HWICs) provide highly flexible connections for Cisco 1800, 2800, and 3800 Series Integrated Services Routers. These HWICs help customers enable applications such as WAN access, legacy protocol transport, console server, and dial access server. You can mix and 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, and high-port-density support. Wide Area Network hwic makes it possible to communicate internally faster and more efficiently HWIC offers better usage with maximum efficiency and convenience