The Cisco 2921 Integrated Services Router (ISR) delivers highly secure data, voice, video, & application services for small offices. Key features include: 3 Integrated 10/100/1000 Ethernet ports with 1 port capable of RJ-45 or SFP connectivity 1 service module slot 4 Enhanced High-Speed WAN Interface Card (EHWIC) slots 3 onboard digital signal processor slots 1 internal service module slot for application services Fully integrated power distribution to modules supporting 802.3af Power over Ethernet (Po E) & Cisco Enhanced Po E Security Embedded hardware-accelerated VPN encryption Secure collaborative communications with Group Encrypted Transport VPN, Dynamic Multipoint VPN, or Enhanced Easy VPN Integrated threat control using Cisco IOS Firewall, Cisco IOS Zone-Based Firewall, Cisco IOS IPS, & Cisco IOS Content Filtering Identity management: Intelligently protecting endpoints using authentication, authorization, & accounting (AAA), & public key infrastructure Voice High-density packet voice DSP module, optimized for voice & video support Standards-certified Voice XML browser services Cisco Unified Border Element capabilities Cisco Unity Express voicemail support Support for Cisco Communications Manager Express & Survivable Remote Site Telephony