6300 Series

The NetVanta 6300 Series of IP Business Gateways integrates a variety of networking functions into a single, space-saving chassis. With this technology, business trunking and Hosted VoIP/IP Centrex services can be delivered seamlessly by combining WAN access, SIP/MGCP gateway, router, optional Power over Ethernet (PoE) switching, security, and Quality of Service (QoS) into an affordable, single-platform solution.
Adtran 6300 Series Routers Features:

Quality of Service (QoS)
SIP/MGCP Gateway Support
24 Fast Ethernet Ports
Stateful Inspection Firewall