3.8 Connection of Extensions

3.8.1 Maximum Cabling Distances of the Extension Wiring (Twisted Cable)

The maximum cabling distance from the PBX is the same even when the KX-T7600 series DPT is the master DPT on the Digital XDP connection.

Notice
	The maximum cabling distance may vary depending on the conditions.

PT-interface CS
(Basic/High-density)

DPT

APT

DSS Console

SLT

DHLC8 Card

MSLC16, CSLC16, SLC16, SLC8 Cards

DLC16, DLC8 Cards

" indicates that the extension card supports the terminal.

3.8.2 Parallel Connection of the Extensions

Any SLT can be connected in parallel with an APT or a DPT as follows.

Note
	In addition to an SLT, an answering machine, a fax machine or a modem (PC) can be connected in parallel with an APT or a DPT.

With APT

For parallel connection, eXtra Device Port (XDP) mode must be disabled for that port through system programming. Refer to "1.13.2 Paralleled Telephone" and "1.5.7 Extension Port Configuration" in the Feature Manual for further information.

With DPT

Parallel mode or eXtra Device Port (XDP) mode can be selected through system programming.

If XDP mode is enabled through system programming, parallel connection is not possible. Refer to "1.13.2 Paralleled Telephone" and "1.5.7 Extension Port Configuration" in the Feature Manual for further information.

Using a Modular T-Adaptor

Using an EXtra Device Port

With KX-T7600 Series DPT (except KX-T7665)

With Other DPT

3.8.3 Digital EXtra Device Port (Digital XDP) Connection

A DPT can be connected to another DPT on the Digital XDP connection. In addition, if the DPT is connected to a DHLC8 card, it can also have an SLT connected in Parallel mode or XDP mode.

Notes
	•	Both DPTs must be KX-T7600 series DPTs (except KX-T7640). Note that the KX-T7667 can only be connected as a slave DPT.
	•	Parallel mode or XDP mode can be selected through system programming.
	•	If XDP mode is enabled through system programming, parallel connection is not possible. Refer to "1.13.2 Paralleled Telephone" and "1.5.7 Extension Port Configuration" in the Feature Manual for further information.

With KX-T7600 Series DPT

Using a Modular T-Adaptor

Using an EXtra Device Port

3.8.4 First Party Call Control CTI Connection

CTI connection between a PC and a KX-T7633/KX-T7636 DPT provides first party call control. The CTI connection is made via a USB interface (version 2.0), and uses the TAPI 2.1 protocol.
A USB Module (KX-T7601) must be connected to the KX-T7633/KX-T7636 DPT.

Note
	The operating system of the PC required for first party call control depends on your CTI application software. For details, refer to the manual for your CTI application software.

Notes
	•	The maximum length of the USB cable is 3 m (9 ft 10 in).
	•	USB Modules must not be connected to DPTs in the Digital XDP connection. In a Digital XDP connection, the PC cannot be used. If a USB module is connected to a slave DPT, the DPT will not work properly.