Primary features include:

• 3 integrated 10/100/1000 Ethernet ports (RJ-45 only)
• 1 service module slot
• 4 enhanced high-speed WAN interface card slots
• 2 onboard digital signal processor (DSP) 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 for secure connectivity and collaborative communications Integrated threat control using Cisco IOS Firewall, Cisco IOS Zone-Based Firewall, Cisco IOS IPS, and Cisco IOS Content Filtering
• Identity management 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