The Cisco 2851 Integrated Services Router features the ability to deliver multiple high-quality simultaneous services at wire speed up to multiple T1/E1/xDSL connections. The 2851 Integrated Services Router offer embedded encryption acceleration and on the motherboard voice digital-signal-processor (DSP) slots, intrusion prevention system (IPS) and firewall functions, optional integrated call processing and voice mail support, high-density interfaces for a wide range of wired and wireless connectivity requirements and sufficient performance and slot density for future network expansion requirements and advanced applications.