User's Manual
User Guide for the SoundPoint IP 670 Desktop Phone
6 - 6
Displays
Symptom Problem Corrective Action
There is no display.
The display is incorrect.
The display has bad contrast.
The expansion module is not 
working.
Power is not correctly applied to 
the SoundPoint IP 670 phone or 
the SoundPoint IP Color 
Expansion Module.
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.
• If using Power over Ethernet (PoE), 
have your system administrator check 
the PoE switch, and that EM power is 
enabled in the Network Configuration 
menu (if using an expansion module).
• Use the screen capture feature. 
Contact your system administrator to 
determine if it is enabled.
The contrast needs adjustment. Do one of the following:
• Refer to Changing the Display 
Contrast on page 5-2.
• Restart the phone to obtain a default 
level of contrast.
• Use the screen capture feature. 
Contact your system administrator to 
determine if it is enabled.
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.
• Use the screen capture feature. 
Contact your system administrator to 
determine if it is enabled.
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 670 SIP 
phone away from the lights.
• Replace the lights in your work 
environment.
• Use the screen capture feature. 
Contact your system administrator to 
determine if it is enabled.










