DVG-5121SP User’s Manual
D-Link Corporation
18
WAN Port MAC:
The default MAC Address is set to the WAN’s physical interface MAC address on the VoIP
telephone adapter. It is not recommended that you change the default MAC address unless
required by your ISP. You can use the
Clone MAC Address
button to replace the WAN port
MAC address with the MAC address of the Ethernet card on your computer. Select Manual
Setting to manually change the WAN Port MAC address.
Ping from WAN:
While enabled, this allows pings from the WAN through the Internet to check if the device is
working or not.
MTU:
You may need to change the MTU (Maximum Transmission Unit) for optimal performance with your
specific ISP. 1500 bytes is the default MTU.
Set DNS server:
The default setting is “Automatically.” If you choose “Manually”, you must enter the Primary
and Secondary DNS server IP addresses assigned by your ISP.