The Cisco Enhanced Ether Switch Service Modules greatly expands the router's capabilities by integrating industry-leading Layer 2 switching with feature sets identical to those found in the Cisco Catalyst 3560-E & Catalyst 2960 Series Switches. The Cisco Enhanced Ether Switch Service Modules are the first modules to take advantage of the increased capabilities on the Cisco 3900 & 2900 Series Integrated Services Routers. in addition, these service modules enable Cisco's industry-leading power initiatives, & per-port Po E power monitoring-all of which enhance the ability of the branch office to scale to next-generation requirements & still meet important initiatives for IT teams to operate a power efficient network.