Nortel Networks 550 manual Check status of Handset, Headset if

User Guide SoundPoint IP 550 Phone

Symptom	Problem	Corrective Action
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	Do one of the following:
	unsuccessful.	• 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	The user pressed the New Call	Check with your system administrator to
on the screen.	soft key, dialed a number with	see when your phone will be registered.
	the handset on-hook, or
	attempted to make a call from the
	contact directory when the phone
	was not registered.

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