There are three types of extension ports, used to connect digital proprietary telephones (DPTs), analog proprietary telephones (APTs), single line telephones (SLTs), DSS Consoles, and Voice Processing Systems (VPS) to the PBX. The devices which can be connected to each type of port are listed below.

a)	DPT Port: DPT, DSS Console, and Panasonic VPS which supports DPT (Digital) Integration
b)	SLT Port: SLT and VPS which supports DTMF Integration
c)	Super Hybrid Port: DPT, APT, SLT, DSS Console, and VPS

EXtra Device Port (XDP):
A super hybrid port can be used as an XDP port, allowing two telephones (a DPT and an SLT) to be connected to the same port of the PBX. This XDP port can be used in one of the following modes:

Mode

Description

XDP Mode

The DPT and SLT have different extension numbers and act as completely different extensions. To use XDP mode, XDP mode must be enabled for the port through system programming (

EXtra Device Port (XDP) Mode [600]).

XDP Parallel Mode

The DPT and an SLT share the same extension number so that they can act as one extension. The SLT uses the extension data (extension number, Class of Service [COS], etc.) of the DPT. (

1.10.9 Paralleled Telephone)

•	Automatic Detection on Super Hybrid Port A DPT, APT, or SLT can be connected to a super hybrid port with no programming required.
•	A DSS Console or a Panasonic VPS which supports DPT (Digital) Integration can also be connected with an SLT in XDP mode.
•	APT and SLT in Parallel Mode An APT and an SLT can also be connected to a super hybrid port and used in parallel mode.
•	Wireless XDP Parallel Mode A PS can be used in Wireless XDP Parallel mode with a wired telephone. ( 1.22.3 Wireless XDP Parallel Mode)
•	DSS Console and Paired Telephone Assignment When a DSS Console is connected, a PT must be paired with the DSS Console through system programming ( Console Paired Telephone [007]).