5
1. Overview
1.1 Introduction
DTL-8R-1 is the cordless phone that is adapted for digital PBX (Private Branch Exchange). It
is usually used in the office environment. When this phone is connected to the digital PBX, it
must have a digital PBX Expansion board inside the Base Station.
PBX
Expansion
Board
Private
Branch
Exchange
(PBX)
Wired Phone
Base
Handset
<Notes>
1) Handset and wired phone cannot be used at the same time.
2) Some digital PBX Expansion boards require the wired phone to make a call.
3) Handset and Base Station must have original ID that is written on each unit at factory.
1.2 Digital interface mode
When digital PBX Expansion board is attached to the Base Station, DTL-8R-1 works as
digital mode. Each digital PBX maker will provide the digital PBX Expansion board.
In this mode, the Handset will transmit key press information, which will be sent to PBX by
the Base Station via serial interface.
The Base Station receives PBX command from the digital PBX Expansion board such as
LED state, LCD message, Ringer state, and Talk path condition and transmit them to the
Handset.
