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Router Cisco 2851 Voice Bundle IOS SP Services, PVDM2-48, 64M/256M

Product Overview

Businesses are moving to IP communications to reduce operational expenses, increase productivity, and simplify network administration. The Cisco integrated services router portfolio i.e., Cisco 1861, Cisco 2800 Series, Cisco 2900 Series, Cisco 3800 Series, Cisco 3900 Series and VG-2xx Series platforms deliver powerful and scalable Unified Communications solutions for the most demanding enterprise environments.
A wide range of Unified Communications security features are available on Cisco integrated services routers to deliver high levels of security protection for businesses deploying IP communications solutions. The Cisco multilayer offering, based on the self-defending network model, starts with the network itself and extends to the endpoints and applications. The SAFE Blueprint from Cisco presents a detailed framework of best practices and tools to help secure business networks.
Media encryption using Secure Real-Time Transport Protocol (SRTP) delivers protection by encrypting the voice conversation, rendering it unintelligible to internal or external eavesdroppers who have gained access to the voice domain. Designed for voice packets, SRTP supports the AES encryption algorithm and is an IETF RFC 3711 standard.
Media encryption on Cisco routers works together with Cisco Unified Communications Manager (CUCM) software and the media encryption feature on Cisco Unified IP phones to secure both gateway-to-gateway calls and IP phone-to-gateway calls. This enables secure analog phone calls, secure fax calls, or secure calls among IP Phones and/or between an IP phone and the gateway, depending on the gateway interface type the media is terminated on. Voice encryption keys derived by Cisco Unified Communications Manager are securely sent by encrypted signaling path to Cisco Unified IP phones and Cisco Unified Border Element (CUBE) through the use of Transport Layer Security (TLS) and to gateways over IP Security (IPSec) protected links.
Media encryption features on Cisco routers are available beginning with Cisco IOS ® Software release 12.3(11)T2 on 1861 & 2800/3800 series platforms with an upgrade to the Advanced Enterprise Services or Advanced IP Services IOS Software Feature Sets, and Universal Image release 15.0(1)M on 2900/3900 series platforms with UC and Security License PAK. The features are enabled on digital signal processing modules (DSPs) available on the PVDM2, PVDM3 and some NMs.