The Cisco 3945E Integrated Services Router (ISR) delivers highly secure data, voice, video, and application services to large branch offices. Cisco 3945E features include: - Modular Services Performance Engine (SPE) 250 for even higher performance as WAN environments evolve; - 4 integrated 10/100/1000 Ethernet ports with 2 SFP ports; - 4 service module slots; - 3 Enhanced High-Speed WAN Interface Card slots; - 3 onboard digital signal processor (DSP) slots. Power - Dual integrated power supplies; - Fully integrated power distribution to modules supporting 802.3af Power over Ethernet (PoE)' - A universal IOS image helps you deploy new IOS services quickly. Security - Embedded hardware-accelerated VPN encryption for secure connectivity; - Integrated threat control using Cisco IOS Firewall, Zone-Based Firewall, IPS, and 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 2500 sessions; - Support for Cisco Unity Express voicemail, Cisco Communications Manager Express, and Survivable Remote Site Telephony.