Cisco 16-Ports Enhanced EtherSwitch Service ModuleThe Cisco 16 Ports Enhanced EtherSwitch Service Module is a powerful, space saving solution that brings high performance switching directly into Cisco 3900 and 2900 Series Integrated Services Routers. By integrating both Gigabit Ethernet (GE) and Fast Ethernet (FE) switch ports into your router, this module enables you to consolidate routing and switching functions on a single platform, unlocking simpler network design, easier management, and a lower