TP-Link TD-W8961ND Operation Manual page 6

7) Connecting to ADSL Network
This page contains the settings needed to connect to the ADSL network. They
Need to look the same as above; all you should need to do is change the VPI to 0
and VCI to 33. Leave the connection type alone (unless it's different from the
image Above). Then Click Next.
8) Configuration
This page is where you configure the wireless component of the router. The
security starts out disabled; we highly encourage our customers to create and
use a Password for their wireless network. The ideal authentication type is
"WPA2-PSK".