The Cisco 3600 Series is a family of modular, multiservice access platforms for medium and large-sized offices and smaller Internet Service Providers. With over 70 modular interface options, the Cisco 3600 family provides solutions for data, voice video, hybrid dial access, virtual private networks (VPNs), and multiprotocol data routing. The high-performance, modular architecture protects customers' investment in network technology and integrates the functions of several devices into a single, manageable solution.The Cisco 3620, a member of the Cisco 3600 series of access platforms, is a two-slot modular access router whose LAN and WAN connections can be configured by means of interchangeable network modules and WAN interface cards. The modular design of the router provides flexibility, allowing you to configure the router to your needs and to reconfigure it if your needs change.