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A simplified user guide for the Panasonic KX series of telephone and voice processing systems.

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 Paralleled Telephone Connection - XDP/DXDP

 Paralleled Telephone Connection - XDP/DXDP Connection

 XDP ports are for industry standard single-line devices only.  DXDP ports are for Panasonic proprietary telephones only.

A proprietary telephone can be connected in parallel with a single-line telephone.  This means both the multi-line proprietary telephone and the single-line telephone are the same extension number and thus cannot be used at the same time.  Operation is slightly different depending on your system type.  The following is a breakout of each system:

KX-TDA, TDE, NCP

 The XDP and DXDP feature is not available on all phones on the systems.  To have the XDP port available your phone must be connected to specific station cards.  Software versions also have an impact on XDP and DXDP availability.  See your dealer for information on each phone.
KX-TD Digital Systems

(XDP Only)

 XDP feature must be turned off in Program 600
The most common example is to plug a cordless phone into the XDP port of your digital phone (7200 or 7400 series).  When your extension is called, both phones ring and can be answered.  In order for your single-line phone to ring you must do the following: 

INTERCOM 391 To turn on parallel ring (INTERCOM 390 to cancel) and the AUTO ANSWER light must be off.  BGM must be turned off.
KX-TA Analog Systems Parallel Connection only.  Feature must be enabled in system programming (Program 610).  In order for the single-line device to ring, the AUTO ANSWER light must be off and BGM must be turned off.  Analog phones do not have an XDP port.  To connect a computer or single-line phone in parallel you will need a T-Adapter plugged into the wall jack.  Make sure the line cord to the phone has 4-conductor wire.

XDP=Extra Device Port.  Digital phones have an extra jack port on the phone which allows you to connect an extra single line device to your phone.

DXDP= Digital Extra Device Port. Digital phones have an extra jack port on the phone which allows you to connect an extra digital telephone to your phone.  7600 series phones only, KX-TDA systems only and certain software levels are required.  The DXDP phone will have a separate extension number and can be programmed independently from your phone.

Parallel Connection:  When you are on one phone and the other phone picks up, the call goes to the second phone and the first phone is disconnected.