Panasonic KX-NCP500 1.5Using a PDN/SDN Button

1.5.1Primary Directory Number (PDN)/Secondary Directory Number (SDN) Extension

1.5Using a PDN/SDN Button

1.5.1Primary Directory Number (PDN)/Secondary Directory Number (SDN) Extension

Primary Directory Number (PDN) buttons and Secondary Directory Number (SDN) buttons are useful when extension users will handle calls for other extensions. For example, a secretary or multiple secretaries can handle calls and check the call status of a boss or multiple bosses. The functions of PDN and SDN buttons are as follows: PDN button: This button can be used to make and receive all calls (including both outside and intercom calls). Having multiple PDN buttons allows multiple calls to be queued at the extension. Extensions that have a PDN button are called PDN extensions. SDN button: The light of an SDN button displays the current call status of the registered extension, similar to a DSS button. In addition, this button can be used to perform the following operations:

•call the PDN extension ( SDN Direct Dial)

•answer calls ringing at the PDN extension

•hold calls and retrieve calls held by the PDN extension ( Call Hold and Call Hold Retrieve)

•transfer calls to the PDN extension ( Call Transfer Using SDN Button) Extensions that have an SDN button are called SDN extensions.

• The extension that is registered as the destination of an SDN button must have at least one PDN button.

•One extension can have up to 8 PDN buttons.

•An extension can have only one SDN button for each PDN extension.

•The button light of each PDN/SDN button shows the current status as follows:

Light Pattern	PDN Button Status	SDN Button Status
Off	The PDN extension is idle.
Green on	The extension is on a call using the PDN	The extension is on a call using an SDN
	button.	button.
Flashing green	A call is on hold at the PDN extension	A call answered with the SDN button is
slowly	(Regular Hold).	on hold (Regular Hold).
Flashing green	A call is on hold temporarily or on Exclusive	A call answered with the SDN button is
moderately	Call Hold.	on hold temporarily or on Exclusive Call
		Hold.
Flashing green	The PDN extension is receiving an incoming	An SDN extension is receiving a Hold
rapidly	call.	Recall or callback ringing from a call
		answered with the SDN button.
Red on	A corresponding SDN extension is using the	The corresponding PDN extension or
	line.	another corresponding SDN extension
		is using the line.
Flashing red	A corresponding SDN extension is holding a	Another corresponding SDN extension,
slowly	call.	or the PDN extension itself, is holding a
		call.

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