The Cisco 3900 series Integrated Services Routers offer embedded hardware encryption acceleration, voice- and video-capable digital signal processor (DSP) slots, intrusion prevention, call processing, voicemail, and application services. In addition, the platforms support the industries widest range of wired and wireless connectivity options such as T1/E1, T3/E3, xDSL, Copper and Fiber GE. The Cisco 3925 Voice Bundle offers superior performance and flexibility for flexible network deployments from small business offices to large enterprise office, all while providing industry-leading investment protection.

• Services integration
  The Cisco 3900 series routers offer increased levels of services integration with voice, video, security, mobility, and data services. The Cisco 3900 series provides the highest performance and slot densities among the routers in the Cisco ISR G2 portfolio, enabling you to maximize services integration and reducing overall capital and operational costs.
• High performance with integrated services
  The Cisco 3900 series enables deployment in high speed WAN environments with concurrent services enabled. A multigigabit fabric (MGF) enables high-bandwidth module-to-module communication without compromising router performance.
• Network agility
  Designed to address customer business requirements, the Cisco 3900 series with the modular architecture offers increased capacity and performance as your network needs grow. The Services Performance Engine (SPE) modular motherboard enables upgrades to processing capability in the future. Dual integrated power supplies provide power redundancy or can be configured to provide additional ePOE power to endpoints. Modular interfaces offer increased bandwidth, a diversity of connection options, and network resiliency.
• Energy efficiency
  The Cisco 3900 series offers intelligent power management and allows the customer to control power to the modules based on the time of day. Cisco EnergyWise technology will be supported in the future. Services integration and modularity on a single platform performing multiple functions, optimizing raw materials consumption and energy usage. High efficiency power supplies and scalable power consumption based on your network needs.
• Investment protection
  Reuse of a broad array of existing modules supported on the original integrated services routers provides a lower cost of ownership. The Cisco 3900 series offers extensive growth possibilities as your network expands. Services Performance Engine (SPE) modular motherboard enables flexibility to upgrades in the future. Highest scale for module density provides flexibility to add services as your business needs expand.