Cisco 3925 Router

Primary features include:

Modular Services Performance Engine (SPE) 100, which can be upgraded for even higher
performance as next-generation WAN environments evolve
3 integrated 10/100/1000 Ethernet ports with 2 ports capable of RJ-45 or SFP connectivity
2 service module slots
4 Enhanced High-Speed WAN Interface Card (EHWIC) slots
4 onboard digital signal processor (DSP) slots
1 Internal Services Module slot
Dual integrated power supplies
Fully integrated power distribution to modules supporting 802.3af Power over Ethernet
A universal IOS image that lets you deploy new IOS services quickly

Security

Embedded hardware-accelerated VPN encryption for secure collaboration
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

Unified Communications

High-density-packet voice DSP module, optimized for voice and video support
Standards-certified VoiceXML browser services
Cisco Unified Border Element capabilities for up to 800 sessions
Cisco Unity Express voicemail support
Support for Cisco Communications Manager Express and Survivable Remote Site Telephony