This Enhanced Feature Pack upgrade enables Virtual Private Networking (VPN) in the NetVanta 4430. With this upgrade, the NetVanta products support up to 1000 simultaneous IPSec VPN tunnels and encryption algorithms like DES, 3DES, and AES. By supporting IPSec, these NetVanta units are fully compatible with other IPSec VPN-equipped NetVanta products.  This upgrade also adds Voice Quality Monitoring (VQM), the ability to graphically monitoring VoIP traffic to determine Jitter, Delay, Lost packets, and Mean Opinion Score (MOS).