4000 Series

The Adtran NetVanta 4000 series of routers offer multiple modular WAN connections. The router provides several enterprise features including MPLS, corporate Frame Relay, point-to-point connectivity, ADSL, and Carrier Ethernet. With three network interface module slots, one being a wide slot, the NetVanta 4000 series can provide a large amount of bandwidth through the router.
Adtran NetVanta 4000 Series Features:

Three-slot, Dual-Ethernet Modular Access Router for eight-T1s of bandwidth or up to 750Mbps of Carrier Ethernet (NetVanta 4430)
Stateful inspection firewall for network security
Quality of Service (QoS) for delay-sensitive traffic like Voice over IP (VoIP)
Voice Quality Monitoring (VQM) for MOS prediction
Recognizable CLI and intuitive Web-based GUI
Wi-Fi Access Controller for centralized management of NetVanta Wireless Access Points (WAPs)