Cisco 2901 Integrated Services Router (ISR) delivers highly secure data, voice, video, and application services for small offices. Key features include: 2 integrated 10/100/1000 Ethernet ports 4 enhanced high-speed WAN interface card slots 2 onboard digital signal processor (DSP) slots 1 onboard Internal Service Module for application services Fully integrated power distribution to modules supporting 802.3af Power over Ethernet (PoE) and Cisco Enhanced PoE Security Embedded hardware-accelerated VPN encryption for secure collaborative VPN communications Integrated threat control using Cisco IOS Firewall, Cisco IOS Zone-Based Firewall