Troubleshooting
Common Issues and Solutions
General Use
Issue Possible Cause & Solution Reference
The display is blank.
• The unit is not receiving power.
→ The
unit is not designed to function when there is a power
failure. Make sure that the device supplying PoE is
receiving power and that the Ethernet cable is properly
connected. If an AC adaptor is connected, confirm that the
AC adaptor is connected and receiving power.
Page 67
The display is not shown
well.
• The display's contrast is too low.
→ Adjust the display's contrast.
Page 45
The unit is not performing
properly.
• Cables or cords are not connected properly.
→ Check all connections.
Page 67
• Your connection settings are incorrect.
→ Consult
your administrator to confirm that your settings are
correct.
→ If the problem persists, consult your dealer.
Page 42
• An error has occurred.
→ Restart the unit.
Page 80
is displayed on the
screen.
• Registration to the SIP server has been lost.
→ Consult your administrator or dealer.
—
I cannot hear a dial tone.
• Confirm that the LAN cable is properly connected.
Page 67
I cannot cancel the display
lock.
• The PIN number you entered was incorrect.
→ Consult your administrator or dealer.
—
I forgot my PIN number.
• Consult your administrator or dealer.
—
The date and time are not
correct.
• Adjust the date and time of the unit.
Page 48
The Message/Ringer lamp
is lit.
• You received a voice message while you were on the phone
or away from your desk.
→ Check the voice message.
Page 37
Document Version 2013-03 Operating Instructions 83
Appendix
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