There are two options to D-Link USB Print Server :
1.Using PS Admin to:
Step 1 Open the PS Admin software, select the print server you wish to reset tos, and then click Factory Reset.
Step 2: Click Yes.
Step 3: Once the reset procedure has been completed, you will see the following screen:
Step 4: Click OK. The device is now set tosettings.
2.By reset button
Step 1: Locate the hole on the back of the print server above the word RESET.
Step 2: Using a paper clip, press and hold the Reset button for about 5 seconds and then release.
Step 3: After the print server reboots it will be reset to the factory default settings.