Digital eXtra Device Port (DXDP)

Since digital phones need just one pair of wires for full functioning, but no one installs just one pair of wires (two individual wires) in the wall, Panasonic wisely decided to use the extra wires to provide a connection path for a second analog phone or telecom device that could be plugged into the XDP on the digital phone.

The second device could share an extension number (when used for a cordless phone, or example) or it could work completely independently (for a modem, fax, credit card terminal, etc.). In the 1990s, XDPs were frequently used for connecting computer modems. But you could not plug in a second multi-line phone.

With the Panasonic KX-TDA and KX-TDE series of phone systems, XDP's advantages have increased. Now, instead of being limited to a single-line analog phone, you can have a full-featured multi-line digital phone plugged into the DXDP (Digital eXtra Device Port). The DXDP allows you to add a second digital telephone to increase your system capacity without the need for additional circuit modules, jacks or wiring. If you don't mind having a second cord attached to a phone, you can save substantial time and money when you need to add additional phones.

The next enhancement is Wireless XDP. Panasonic TDA and TDE systems allow wireless communication over an extended range by using multiple cell stations that communicate with wireless phones. Wireless phones in the systems can be linked to specific wired phones through programming, rather than by plugging into the DXDP, so a roving phone can ring whenever the associated wired phone is called, so people don't miss calls when they are away from their desks.