D-Link DSL-2750U User Manual page 26


PPP Username: The correct user name that your ISP provides to you.
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PPP Password: The correct password that your ISP provides to you.

Authentication Method: The value can be AUTO, PAP, CHAP, or
MSCHAP. Usually, you can select AUTO.

Dial on demand (with idle timeout timer): If this function is enabled, you
need to enter the idle timeout time. Within the preset minutes, if the modem
does not detect the flow of the user continuously, the modem automatically
stops the PPPoE connection. Once it detects the flow (like access to a
webpage), the modem restarts the PPPoE dialup.
If this function is disabled, the modem performs PPPoE dial-up all the time.
The PPPoE connnection does not stop, unless the modem is powered off
and DSLAM or uplink equipment is abnormal.

MTU Size: Maximum Transmission Unit. Sometimes, you must modify this
function to access network successfully.

PPP IP extension: If this function is enabled, the WAN IP address
obtained by the modem through built-in dial-up can be directly assigned to
the PC being attached to the modem (at this time, the modem connects to
only one PC). From the aspect of the PC user, the PC dials up to obtain an
IP addres. But actually, the dial-up is done by the modem.
If this function is disabled, the modem itself obtains the WAN IP address.

Use Static IP Address: If this function is disabled, the modem obtains an
IP address assigned by an uplink equipment such as BAS, through PPPoE
dial-up.
If this function is enabled, the modem uses this IP address as the WAN IP
address.

Enable NAT: Select it to enable the NAT functions of the modem. If you do
not want to enable NAT and wish the modem user to access the Internet
normally, you must add a route on the uplink equipment. Otherwise, the
access to the Internet fails. Normally, NAT should be enabled.

Enable Firewall: Enable or disable IP filtering.

Enable IGMP Multicast: IGMP proxy. For example, if you wish that the
PPPoE mode supports IPTV, enable this function.
If you select the MAC Encapsulation Routing(MER) as the connection protocol,
the following page appears.
DSL-2750U User Manual
23