9-Pin Subd Connector; Table 53: 9-Pin Subd Connector Pins - Motorola Malux MTM5x00 Series Installation Manual

68015000181-LB
Chapter 5: Connectors and PIN Assignment
PIN Function
19 GROUND
20 IGNITION
21 ON_OFF_GND
22 EXPANSION_PTT
23 Not Connected
24 HANDSET_AUDIO
25 Not Connected
5.4.3

9-Pin subD Connector

The pin assignment of this 9-pin subD connector follows the requirements of an RS232 standard
interface with the RS232 voltage level. The cable (see section "Connecting Cables") which has to be
used is a standardized serial interface cable which allows to connect a data device with an RS232
Interface such as PC, Laptop, Console.
Table 53: 9–Pin subD Connector Pins
Pin Function
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
100
Description
Ground
Connecting this pin to the ignition line of the vehicle will automati-
cally turn on the radio if ignition of the vehicle is turned on.
This is the On/Off control for the old Control Head "J" (MTM300
Control Head)
Expansion PTT, works together with INT_MIC
NC
Handset audio to earpiece impedance has to be > 200 Ohm
NC
Description
Data Carrier Detect
Received Data Serial
Transmitted Data
Data Terminal Ready
Ground Output
Data Set Ready
Request to Send
Clear to Send
Ring Indicator
PC Direction
Input
Serial IN
Serial OUT
Output
Output
Input
Output
Input
Input
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