D-Link DSL-2750B User Manual page 31

Section 3 - Configuration
For PPPoE/PPPoA CONNECTION
Select Protocol and Encapsulation Mode from the drop-down list.
Type in PPP Username and PPP Password and Confirm PPP
Password which are provided by your ISP.
Authentication Method
The value can be AUTO, PAP, CHAP, or MSCHAP. Usually, you can
select AUTO.
Dial on demand (with idle timeout timer): Check the box to enable the
function, users need to enter the idle timeout time. The modem stops the
PPPoE connection when detecting no continuous flow from the user.
Once detecting 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, only if the modem is powered off or DSLAM/Uplink equipment
behaves abnormal.
MTU (Maximum Transmission Unit)/ MRU (Maximum Receive Unit) Size
Set MTU/MRU Size between 128 - 1492.
PPP IP Extension:
Check the PPP IP Extension, the router passes the obtained IP
address to the local PC and acts as a bridge only modem.
Config Keep Alive: Check the box to let the PPPoE dial-up keep alive
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.
D-Link DSL-2750B User Manual 31