57D-Link DWR-932C User Manual
Section 3 - Conguration
Reset and Reboot
In the Reset and Reboot tab you can reboot your router or reset it to factory default.  You can also manually reset your router 
to factory default by pressing the WPS button and power button simultaneously for 5~10 seconds.
Select the Reset to Default button to reset the 
DWR-932C to factory default.
Select the Reboot button to reboot the DWR-932C.
Reset to Default
Reboot
Reset and Reboot