... analog phone devices, and one fast Ethernet WAN port, and one fast Ethernet LAN port for local home or business network ... can be used with residential, home-office, and small business VoIP service offerings, including full-featured hosted or open source IP ... VLAN support, DiffServ support, VPN passthrough, SNTP support, Quality of Service (QoS), DHCP server, port forwarding, IPv4 support, DHCP client ...