Shared Internet Access. All users on the LAN can access the Internet through the QJ-A4400 using only a single external IP Address. The local (invalid) IP Addresses are hidden from external sources. This process is called NAT(Network Address Translation). Built-in ADSL 2/2+ Modem. The QJ-A4400 provides ADSL 2/2+ modem, and supports all common ADSL connections. IPoA, PPPoE, PPPoA, Direct Connection Support.Various WAN connections are supported by QJ-A4400. Auto-detection of Internet Connection Method. In most situations, the QJ-A4400 can test your ADSL and Internet connection to determine the connection method used by your ISP. Fixed or Dynamic IP Address.On the Internet (WAN port) connection, the QJ-A4400 supports both Dynamic IP Address (IP Address is allocated on connection) and Fixed IP Address.