Troubleshooting - Yealink SIP-T42G User Manual

User Guide SIP-T42G IP Phone

Troubleshooting

This chapter provides general troubleshooting information to help you solve the
problems you might encounter when using your SIP-T42G IP phone.
If you require additional information or assistance with your new phone, contact your
system administrator.
Why is the phone LCD screen blank?
Ensure your phone is properly plugged into a functional AC outlet.
Ensure that the phone isn't plugged into a plug controlled by a switch that is off.
If the phone is plugged into a power strip, try plugging it directly into a wall outlet
instead.
If your phone is powered from PoE, ensure you use a PoE compliant switch or hub,
or contact your system administrator for more information.
Check that the power LED is on to ensure the phone is powered on.
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.
Contact your system administrator for more information.
Why can't I get a dial tone?
Check for any loose connections and that the phone has been installed properly. For
the installation instructions, refer to
Check whether dial tone is present on one of the audio modes.
Switch between the Handset, Headset (if present) or Hands-Free Speakerphone to
check whether dial tone is present for one of the audio modes.
If the dial tone exists on another audio mode, connect a different handset or
headset to isolate the problem.
Why doesn't the phone ring?
Check the ringer volume on your phone. To adjust the ringer volume setting, press the
Volume key when the phone is on-hook and idle. For more information, refer to
on page 23.
88
Phone Installation on page 11.
Volume