The PLANET ADSL 2/2+ VoIP Router - IAD-300 provides ISP or residential home users the ideal solution for sharing a high-speed ADSL 2/2+ broadband Internet connection on 4-Port 10/100Base-TX Fast Ethernet backbone and able to make the VoIP calls through Internet. The IAD-300 can support up to 24Mbps downstream transmission rate and up to 3.5Mbps upstream transmission rate. It also supports PPPoA (RFC 2364 - PPP over ATM Adaptation Layer 5), PPP over Ethernet (RFC 2516), RFC 1483 encapsulation over ATM (MER, bridged or routed), and IPoA (RFC1577) to establish a connection with ISP.
Via the user-friendly management interface, the IAD-300 can be managed by workstations running standard web browsers. Furthermore, the IAD-300 provides DHCP Server, Virtual Server, DMZ, Access Control, IP Filter, VPN Pass-Through, DDNS, Printer Server and UPnP capability. 
The IAD-300 serves as an Internet firewall, protecting your network from being accessed by outside users. Besides, compliant with the SIP (RFC3261) protocol, the IAD-300 helps users to make high quality VoIP calls in a cost-effective way, either through Internet or the local phone system.