The Cisco VPN Series 3000 Concentrator allows corporations to take full advantage of the unprecedented cost savings, flexibility, performance, and reliability of remote access VPN connections without the expense of individual feature licensing. Corporations use VPNs to establish secure, end-to-end private network connections over a public networking infrastructure. The Cisco VPN 3020 Concentrator is a VPN platform designed for medium to large organizations with bandwidth requirements from full T1/E1 through T3/E3 (50 Mbps maximum performance) with support for up to 750 simultaneous IPSec sessions or 200 simultaneous clientless sessions. Specialized SEP modules (SEP-E) perform hardware-based acceleration. The Cisco VPN 3020 cannot be upgraded to other products in the family. Redundant and nonredundant configurations are available.