The Cisco 1750 Modular ADSL Access Router features a modular architecture that enables users to cost-effectively upgrade or add WAN and voice interfaces to accommodate changing requirements and growth. Integrated network services and functions, including an optional firewall, CSU/DSU, and VPN features, reduce the complexity of deploying and managing branch office solutions. Most important, the Cisco 1750 offers investment protection with a RISC architecture and features to support new technologies and applications, including voice/fax/data integration and VPNs, when users are ready to deploy them. The modular Cisco 1750 adapts easily to fit the needs of businesses. Interchangeable WAN interface cards enable easy additions or changes in WAN technologies without requiring a forklift upgrade of the entire platform.