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DVG-7111S User's Manual
3-2-4-2 NAT Traversal
If your VoIP TA is set up behind an Internet sharing device, you can select either the NAT or STUN
protocol.
ADVANCED → Advanced Network → NAT Traversal
Enable NAT Public IP: Check the box to use the IP address of the Internet sharing device if the VoIP
TA is set up behind an Internet sharing device. Also the VoIP TA will use the IP address of the Internet
sharing device as the public IP when it connects to Internet. Furthermore, some of the Internet sharing
device's type is symmetric NAT. You need to set Virtual Server or Port Mapping (Forwarding) from the
Internet sharing device for the listen port and communication ports (RTP ports) of the VoIP TA.
NAT IP/Domain: Enter the real public IP address of the IP sharing device or the router; or enter a true
URL (Uniform Resource Locator) when DDNS is used. Please refer to the DDNS settings.
Note: If you are setting a public IP in this field, it has to be a static public IP, otherwise VoIP
communication may not be established properly. Please contact your ISP to check if your Internet
connection has static public IP addresses.
Enable STUN Client: Check the box to use the STUN protocol prevents problems from setting the IP
sharing function. (Some NATs do not support this protocol.)
Note: You can use the "Status STUN Inquiry" page to detect the NAT type of your Internet sharing
device. If the NAT type is "Symmetric NAT," then the VoIP TA is not able to traverse the NAT. It is not a
flaw of the VoIP TA design, but rather a limitation of the STUN protocol.
STUN Server IP/Domain and Port: Enter the IP address and listen port of the STUN server. You can
set two STUN server IPs separated by a semicolon.
Enable UPnP Control Point: Check the box to enable the VoIP TA's IP traffic to pass through an
Internet sharing device. This function only works when the Internet sharing device supports UPnP and
has it enabled.
Note: The "Status Current Status" page will show the status of UPnP.
D-Link Systems, Inc.
MAINTENANCE
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