The Cisco 1921 builds on the best-in-class. All Cisco 1900 Series Integrated Services Routers offer embedded hardware encryption acceleration, & advanced security services. In addition, the platforms support the industrys widest range of wired & wireless connectivity options. The Cisco 1921 is architected to meet the application demands of todays branch offices with design flexibility for future applications. The modular architecture is designed to support expanding customer requirements, increased bandwidth, & fully integrated power distribution to modules supporting 802.3af Po E & Cisco Enhanced Po E (e Po E). The Cisco 1921 provides significantly enhanced modular capabilities that offer you investment protection. You can easily interchange modules used on the Cisco 1921 with other Cisco routers to provide maximum investment protection. Taking advantage of common interface cards across a network greatly reduces the complexity of managing inventory requirements, implementing large network rollouts, & maintaining configurations across a variety of branch-office sizes.