User Manual

Troubleshooting
379
Password Issues
How to restore the administrator password?
Factory reset can restore the original password. All custom settings will be overwritten after
reset.
Power and Startup Issues
What will happen if I connect both PoE cable and power adapter? Which
has the higher priority?
Phones use the PoE preferentially.
Why does the phone have no power?
If no lights appear on the phone when it is powered up, do one of the following:
 Reboot your phone.
 Replace the power adapter.
Why is the LCD screen black?
If the power indicator LED is on, the keypad is usable but the LCD screen is black, please reboot
your phone.
Other Issues
How do I find the basic information of the Skype for Business phone?
Press Menu-> Status when the Skype for Business phone is idle to check the basic information
(e.g., IP address, MAC address and firmware version).