The Cisco 3925 Integrated Services Router (ISR) delivers highly secure data, voice, video, and application services to small branch offices. Key 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