Cisco ASA 5500 Series Adaptive Security Appliances are easy-to-deploy solutions that integrate world-class Unified Communications (voice/video) security services in a flexible, modular product family. Designed as a key component of the Cisco self-defending network, the Cisco ASA 5500 series provides intelligent threat defense and secure communications services that stop attacks before they impact business continuity. Designed to protect networks of all sizes, the Cisco ASA 5500 series enables organizations to lower their overall deployment and operations costs while delivering comprehensive multilayer security.Protect your Unified Communications infrastructure, call control, endpoints, and applications from attack. The Cisco ASA 5500 series delivers market-leading Unified Communications security services with the widest portfolio of application inspection and threat prevention services for voice/video - protecting against attacks such as protocol fuzzing, denial of service (Dos), rogue phone callers, and much more.Cisco ASA 5520 Adaptive Security Appliance UC Security Edition includes 4 Gigabit Ethernet interfaces, 1 Fast Ethernet interface, 1000 UC proxy sessions, 750 IPsec VPN peers, 2 SSL VPN peers, Active/Active and Active/Standby high availability and triple Data Encryption Standard/Advanced Encryption Standard (3DES/AES) license.