The NetVanta 300, 1000, 3000, 4000, and 5000 Series of Access Routers offers an extremely cost-effective alternative when connecting headquarters to a branch office, or when accessing the Internet. These modular routers deliver the same performance you have come to expect from this class of routers at a greatly reduced cost. These full-featured, high-performance routers include stateful inspection firewall, QoS, and DSU/CSU as standard equipment, and offer voice support, PPP dial backup, and VPN.