2-port HWIC w/ 1-port ADSLoISDN and 1-port ISDN BRI-S/T Cisco 2-port HWIC with ADSL over ISDN and ISDN BRI ports (spare). dsl Features: ADSL. Data Transmission: 0.024 Gbit/s. Networking: Wired. Connectivity: HWIC. Weight & Dimensions: 3.07 x 4.72 x 0.748 inch (78 x 120 x 19 mm), 3.7 oz (105 g) The new ADSL HWICs provide ADSL connectivity to a WAN. These HWICs, combined with the Cisco 1841 integrated services router (ISR) and the Cisco 2800 and 3800 series integrated services routers (ISRs), provide high-speed digital data transmission between customer premises equipment (CPE) and a central office. This enables service providers and resellers to offer additional services by supporting features for business-class security, voice integration, differentiated classes of service (CoS), and managed network access with Cisco IOS Software. These value-added features, along with the manageability and reliability of Cisco IOS Software technology, provide the mission-critical networking that businesses require.