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User Guide SoundPoint IP 450 Phone
5 - 6
The phone does not ring. Ring setting or volume is low. Do one of the following:
• Adjust the ringing level from the front
panel using the volume up/down keys.
• Check status of Handset, Headset (if
connected), and Hands-Free
Speakerphone.
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.
You turned off the ringer. Do one of the following:
• During an incoming call, lift the
handset, press the Speakerphone
key, or press the Headset key to
obtain a dial tone.
• Press the ringing Line Key or the
Answer soft key to answer the call.
“Service Unavailable” appears
on the screen.
The user pressed the New Call
soft key, dialed a number with
the handset on-hook, or
attempted to make a call from the
contact directory when the phone
was not registered.
Check with your system administrator to
see when your phone will be registered.
Symptom Problem Corrective Action