D-Link DVG-5121SP User Manual page 25

Basic Network Settings
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. The default MAC address is set to the WAN's physical interface MAC
address on the VoIP telephone adapter. You can use the "Clone MAC Address" button to copy the
MAC address of the Ethernet Card installed by your ISP and replace the WAN MAC address with
the MAC address of the router.
Ping from WAN: While enable, it allows end user ping from WAN through internal to check the device working or
not.
MTU: Maximum Transmission Unit - you may need to change the MTU for optimal performance with your specific
ISP. 1500 is the default MTU.
MRU: Maximum Receive Unit - you may need to change the MRU for optimal performance with your specific ISP.
1500 is the default MRU.
IP Address: Enter the IP address (Static PPTP only).
Subnet Mask: Enter the Primary and Secondary DNS Server Addresses (Static PPTP only).
VoIP telephone adapter: Enter the VoIP telephone adapter IP Address provided by your ISP.
Server IP/Name: Enter the Server IP provided by your ISP (optional).
PPTP Account: Enter your PPTP account name.
PPTP Password: Enter your PPTP password and then retype the password in the next box.
Connect Type: Select either Keep Alive or Manual on.
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DVG-5121SP User's Manual
D-Link Corporation