1.5 Using a PDN/SDN Button1.5.1 Primary Directory Number (PDN)/Secondary Directory Num-ber (SDN) Extension (KX-TDA100/KX-TDA200/KX-TDA600 only)Primary Directory Number (PDN) buttons and Secondary Directory Number (SDN) but-tons 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 bossor 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 outsideand intercom calls). Having multiple PDN buttons allows multiple calls to be queued atthe 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 registeredextension, similar to a DSS button. In addition, this button can be used to perform thefollowing 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 HoldRetrieve)• 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 onePDN button.• One extension can have up to 8 PDN buttons.• An extension can have only one SDN button for each PDN extension.• A PDN extension can only receive OHCA or Whisper OHCA from the corresponding SDNextension. When a call is made from another extension, a PDN extension will receive a callwaiting tone.• The button light of each PDN/SDN button shows the current status as follows:Light Pattern PDN Button Status SDN Button StatusOff The PDN extension is idle.Green on The extension is on a call using the PDN but-ton.The extension is on a call using an SDNbutton.Flashing greenslowlyA call is on hold at the PDN extension (Reg-ular Hold).A call answered with the SDN button ison hold (Regular Hold).Flashing greenmoderatelyA call is on hold temporarily or on ExclusiveCall Hold.A call answered with the SDN button ison hold temporarily or on Exclusive CallHold.Flashing greenrapidlyThe PDN extension is receiving an incomingcall.An SDN extension is receiving a HoldRecall or callback ringing from a call an-swered with the SDN button.Red on A corresponding SDN extension is using theline.The corresponding PDN extension or an-other corresponding SDN extension isusing the line.90 User Manual1.5.1 Primary Directory Number (PDN)/Secondary Directory Number (SDN) Extension (KX-TDA100/KX-TDA200/KX-TDA600 only)
