Content acceleration and delivery enhance user productivity while optimizing WAN bandwidth. The Cisco Content Engine Network Modules combine the advanced content acceleration features of the Cisco Content Engine 500 Series with the Cisco 2600, 3600, and 3700 series into one easy-to-manage content networking solution.Cisco's Content Engine Network Modules for the Cisco 2600, 3600, and 3700 series routers offer the industry's first and only router-integrated content-delivery system. Combining intelligent caching, content routing, and management with robust branch-office routing conserves WAN bandwidth for important branch IP services such as voice over IP (VoIP), while simplifying configuration, deployment, and operation. Running Cisco Application and Content Networking System (ACNS) Software, Content Engine Network Modules enable Cisco customers to extend the value of their branch router infrastructures to deliver strategic new application services - such as employee Internet management, streaming media, and live and on-demand e-communications and e-learning - with no performance degradation of core routing services. Further, the Content Engine Network Modules interoperate with all Cisco IOS routers, and takes advantage of key Cisco IOS features such as multicast and Web Cache Control Protocol (WCCP), while supporting a common command-line interface (CLI).