Buffalo Technology AirStation WHR-G54S - Manual (Page 73)

In the Web-Based Configuration Utility, click on the
Advanced tab, select Wireless Config, and choose
Basic. Change the wireless channel to match the one
you set for the first AirStation. Change Framebursting
from 125 High Speed Mode to Framebursting or Do not
use (whichever you chose for the first AirStation). For
easy roaming, you may change the SSID to match the
current SSID setting of the other AirStation. Click
Apply. Your AirStation will reboot in 30-60 seconds.
Now, under Wireless Config, choose Repeater.
Confirm that Repeater-Bridge (WDS) is set to Enable.
Click Edit Registered WDS Partners.
Configuring a WDS Bridge