The Cisco 820 Series of business-class ADSL routers provide business-class functionality for small businesses and corporate teleworkers through the power of Cisco IOS technology. They enable service providers and resellers to increase service revenue by supporting features for stateful firewalls and VPNs, integrated toll-quality voice, and differentiated classes of service. These value-added features, along with the manageability and proven reliability of Cisco IOS technology, provide the mission-critical networking that businesses require.Part of the award-winning Cisco 800 series, the Cisco 826 business-class asymmetric digital subscriber line (ADSL) router. The Cisco 826 supports asymmetric digital subscriber line (ADSL) over ISDN for regions that have a substantial install base of ISDN customers. The Cisco 826 is data only model. The Cisco 826 ADSL router is ideal for up to 20 users in a small office or as an enterprise telecommuting solution, supporting scalable, secure, quality, and proven business solutions.