The Cisco 2800 Series of integrated services routers intelligently embed data, security, & voice services into a single, resilient system for fast, scalable delivery of mission-critical business applications. The unique integrated systems architecture of the Cisco 2800 Series delivers maximum business agility & investment protection. The Cisco 2800 Series comprises four new platforms: the Cisco 2801, the Cisco 2811, the Cisco 2821, & the Cisco 2851. The Cisco 2800 Series provides significant additional value compared to prior generations of Cisco routers at similar price points by offering up to a fivefold performance improvement, up to a tenfold increase in security & voice performance, new embedded service options, & dramatically increased slot performance & density while maintaining support for most of the more than 90 existing modules that are available today for the Cisco 1700, Cisco 2600, & Cisco 3700 Series. The Cisco 2800 Series features the ability to deliver multiple high-quality simultaneous services at wire speed up to multiple T1/E1/x DSL connections. The routers offer embedded encryption acceleration & on the motherboard voice digital-signal-processor (DSP) slots; intrusion prevention system (IPS) & firewall functions; optional integrated call processing & voice mail support; high-density interfaces for a wide range of connectivity requirements; & sufficient performance & slot density for future network expansion requirements & advanced applications.