User Manual

5. ELECTRICAL DESCRIPTION

LZ T 123 7605 P1C

Control Terminal - Radio Device Signal Cross-reference Table B

5.3 Audio Connector

A 4-way RJ9 connector, as shown below, allows a telephone handset to be

plugged into the Control Terminal, giving access to the microphone and

earpiece signals. The connector may also be used to drive other analogue

audio sub-systems or devices.

The module is configured to work with a range of handsets. If necessary,

changes can be made to the characteristics of the audio interface by sending

the Control Terminal appropriate AT commands.

Control Device (CT) Relationship to

Radio Device (RD) engine

CT Pin CT Alternative

signal

Dir. Pin Corresponding RD

Signal

HD15 Connector

1OUT-6 O38O1

I42

3 O41

4TD-2 I43TD3

5RD-2 O44RD3

6OUT-7 O32O3

7IN-4 I39IO9

8OUT-8 O40O4

9OUT-5 O20DAC

10 OUT-9 O 36 O2

11 RTS-2 I 24 IO4

12 CTS-2 O 23 IO3

13 IN-5 I 37 IN1