| Troubleshooting |
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Checking the IP Address of Device
Why is the screen blank?
• If the device is powered from PoE, ensure you use a PoE-compliant switch or hub.
• Ensure that the device is properly plugged into a functional AC outlet.
Why does the device display “Network unavailable”?
• Ensure that the switch or hub in your network is operational.
Why do the device display time and date incorrectly?
Check whether your device obtains the time and date from the SNTP server automatically. If the device
fails to connect the SNTP server, contact your system administrator for more information. You can also
configure the time and date manually.
How can I obtain the MAC address when the device is not powered on?
You can use one of the following ways to obtain the MAC address of a device:
• The PO (Purchase Order) provided by the supplier.
• The label of the carton box.
• The phone’s bar code on the back of the phone.
Why can't I receive calls?
• Check if the account is logged in.
• Check whether your status is DND mode, if it is, you should reset status.
• Check whether the call forward is enabled on the phone.
Why doesn't my handset work?
• Check that the headset cord is fully connected to the headset jack on the phone.
How can I switch to Skype for Business edition?
• Upgrade firmware via the web user interface.
• Auto provisioning.