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Troubleshooting Your Phone
5 - 7
Displays
Symptom Problem Corrective Action
There is no display.
The display is incorrect.
The display has bad contrast.
Power is not correctly applied to
the SoundPoint IP 450 phone.
Do one of the following:
• Check that the screen is illuminated.
• Make sure the LAN cable is inserted
properly at the back of the phone (try
unplugging and re-inserting the
cable).
• If using Power over Ethernet (PoE),
have your system administrator check
that the switch is supplying power to
the phone.
The contrast needs adjustment. Do one of the following:
• Refer to Changing the Display
Contrast on page 2-3.
• To obtain a default level of contrast,
restart the phone. (Refer to * on page
*).
Outbound or inbound calling is
unsuccessful.
Do one of the following:
• Place a call to the phone under
investigation. Check that the screen
indicates incoming call information.
• Lift the handset. Ensure the dial tone
is present and place a call to another
extension or number. Check that the
screen changes in response.
The display flickers. A certain type of older
fluorescent lighting causes the
display to appear to flicker.
Do one of the following:
• Move the SoundPoint IP 450 SIP
phone away from the lights.
• Replace the lights.