DCP -WR300N User Manual page 44

There are two ways for the wireless client to establish the connection with the
modem through WPS. The modem generates PIN, see the above figure. Click
Regenerate PIN to generate a new PIN, and then click Start PBC, In the
wireless client tool, enter the PIN which is generated by the modem, start
connection. The client will automatically establish the connection with the modem
through the encryption mode, and you need not to enter the key. The other way is
the wireless client generates PIN. In the above figure, enter PIN of the wireless
client in the Client PIN Number field, then click Start PIN to establish the
connection.
Note:
The wireless client establishes the connection with the modem through WPS
negotiation.The wireless client must support WPS as well.
Configuration
41 DCP-WR300N