Source – EMAK Telecom
Factory Resetting the W60B Base
The following steps may also apply to Yealink models W52B, W70B and W80B.
Method#1 from The Base
Step 1 – Power off
Power off the unit by unplugging the power cord from the back (for PoE, disconnect the network cable).
Step 2 – Wait for 15 seconds.
Step 3 – press and hold
With the unit unplugged, press and hold the connect button on the base station.

Step 4 – plug the power
While still holding the connect button, plug the power (or network cable if PoE) back into the unit.
Wait until all three lights on the unit are showing as solid green, and release the connect button.
Step 6 – Wait approximately 5 minutes.
Step 7 – Reboot
the unit by unplugging it from power for 15 seconds and plugging it back in.
Method#2 From a Connected Handset
Press the OK button in the middle of the phone to bring up the Phone’s menu.

Step 2 – Settings
Using the directional buttons, navigate to Settings and press OK.

Step 3 – System Settings
Enter System Settings by pressing 8 on the dialpad, or scrolling down (with directional buttons) and pressing OK.

Step 4 – Base Reset
Navigate to Base Reset and press OK.

Step 5 – PIN 0000
Enter the PIN for your device (default is “0000”) and press Done.

Step 6 – Success
The base will now factory reset and upon completion, will display “Success” (or similar) on the phone screen.

Step 7 – Optional
Once done, pair the handset, if you need some help pairing the handset, you can take a look at this guide: