Our Product 
Cisco 2921 Integrated Services Router (ISR) delivers highly secure data, voice, video, and 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 (PoE) and Cisco Enhanced PoE
- 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, and Cisco IOS Content Filtering
- Identity management: Intelligently protecting endpoints using authentication, authorization, and accounting (AAA), and public key infrastructure
- Voice
- High-density packet voice DSP module, optimized for voice and video support
- Standards-certified VoiceXML browser services
- Cisco Unified Border Element capabilities
- Cisco Unity Express voicemail support
- Support for Cisco Communications Manager Express and Survivable Remote Site Telephony
