NC-link NC-AP212 User Manual page 9

Then "Scan AP", choose the AP which do you want to link and select it
Take WirelessAP 2 as example, choose wirelessAP 2 and click "Select AP" after "Refresh"
Key: Input WirelessAP 2's password
b).PPPOE(ADSL)
If your access type is PPPoE, with ADSL virtual dialing, you need to fill in following details:
User Name: Fill in ADSL access user name which supply by ISP, if you not sure can check with ISP.
Password: Fill in ADSL access password which supply by ISP, if you not sure can check with ISP.
5) LAN Setting
Click "Advanced Setting", can check as p14
Click "Network Settings"→ " LAN Interface, P15 will be showed
P13 Scan AP
P14 Advanced Settings