The Cisco 3600 Series is a family of modular, high-performance multiservice access routers for medium and large-sized branch offices and Internet service providers. With over 100 modular interface options (shares modular interfaces with the 2600/2600XM series), the Cisco 3600 Series provides solutions for voice/data integration, virtual private networks (VPNs), dial access, and multiprotocol data routing. Using Cisco's digital and analog voice/fax network modules, the Cisco 3600 Series allows customers to consolidate voice, fax, and data traffic on a single network. Its architecture protects customers' investment in network technology and integrates the functions of several devices into a single, manageable solution. Cisco 3600 VPN and Dial Bundles are also available to also address specific VPN/security, and dial-up remote access server requirements.