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Troubleshooting
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This chapter provides general troubleshooting information to help you solve the
problems you might encounter when using your SIP-T48G IP phone.
If you require additional information or assistance with your new phone, contact your
system administrator.
Why is the touch screen blank?
Ensure that the phone is properly plugged into a functional AC outlet.
Ensure the output of the power adapter is 5V/2A.
Ensure that the phone is plugged into a socket controlled by a switch that is on.
If the phone is plugged into a power strip, try to plug it directly into a wall outlet
instead.
If the phone is powered from PoE, ensure you use a PoE-compliant switch or hub.
Why does the phone display "Network Unavailable"?
Ensure that the Ethernet cable is plugged into the Internet port on the phone and
the Ethernet cable is not loose.
Ensure that the switch or hub in your network is operational.
Why doesnt the phone display time and date correctly?
Check if you have configured the phone to obtain the time and date from the SNTP
server automatically. If the phone fails to connect the SNTP server, contact your system
administrator for more information. You can also configure the time and date manually.
For more information, refer to Time & Date on page 27.
How do I find the basic information of the IP phone?
Press the OK key when the IP phone is idle to check the basic information of the IP phone,
such as IP address and firmware version. For more basic information, refer to Phone
Status on page 18.
How to obtain the MAC address of a phone when the phone is not powered on?
Three ways to obtain the MAC address of a phone:
You can ask your supplier for shipping information sheet which includes MAC
addresses according to the corresponding PO (Purchase Order).
You can find the MAC address in the label of carton box.
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