Cisco Systems CP9951CCAMK9 manual New Call softkey, Lines on your phone

		Your Phone
4	Session labels	Display information (such as call status and duration) about held calls
	(with Held Call icons)	associated with the selected line.
		Calls are displayed on the right side of the phone screen from the oldest
		(at the top) to the newest.
		Pressing the session button next to a Held Call icon resumes the held
		call for that session.
5	Softkeys	Softkey options for the selected call only.
		If you select a different call (by pressing a feature button or the
		Navigation pad, or by answering a ringing call), the softkey options
		may change.
6	Answer label	Displays if your system administrator has assigned the Answer feature
		to the programmable feature button.
		Pressing this label or the corresponding button answers the oldest
		incoming call without having to scroll down the call list and select the
		call.
7	Speed-dial label	Displays if you or your system administrator assigned a speed dial to
		the programmable feature button. This is useful if you tend to have
		more than five active calls on your phone.
8	Nonprimary line labels	Display calls and information about nonprimary phone lines.
9	All Calls label	Displays if the All Calls feature is enabled. Pressing the corresponding
		button displays all calls on all lines.
		Calls are displayed on the right side of the phone screen from the oldest
		(at the top) to the newest.
		When you are on a call, pressing All Calls once selects the current call
		or the first call on the list; pressing All Calls twice selects the header.
		With the header selected, the softkeys that display are the same as those
		that display when the phone is idle. This is useful, for example, if you
		have multiple calls on your phone and want to access the
		New Call softkey.
		Using the All Calls feature is recommended highly if you have multiple
		lines on your phone.

Cisco Unified IP Phone 8961, 9951, and 9971 User Guide for Cisco Unified Communications Manager 7.1(3) (SIP) 13