DESC: The PIX 515E "Unrestricted" (PIX 515E-UR) model extends the capabilities of the family with support for stateful failover, additional LAN interfaces, and increased VPN throughput via integrated hardware-based VPN acceleration. It includes an integrated VAC or VAC+ hardware VPN accelerator, 64 MB of RAM, and support for up to six 10/100 Fast Ethernet interfaces. The Cisco PIX 515E-UR also adds the ability to share state information with a hot-standby Cisco PIX Security Appliance for resilient network protection.