TP-Link TD-W8901N User Manual page 34

 Servicename: Enter a name to mark current connection, or you can leave it blank.
 Username: Enter your username for your PPPoA/PPPoE connection.
 Password: Enter your password for your PPPoA/PPPoE connection.
 Encapsulation: For both PPPoA/PPPoE connection, you need to specify the type of
Multiplexing, either LLC or VC Mux.
 Bridge Interface: Activate the option, and the Router can also work in Bridge mode.
 Connection: For PPPoA/PPPoE connection, you can select Always on or Connect
on-Demand or Connect Manually. Connect on demand is dependent on the traffic. If there is
no traffic (or Idle) for a pre-specified period of time), the connection will tear down
TD-W8901N 150Mbps Wireless N ADSL2+ Modem Router User Guide
Figure 4-9
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