9-Pin Subd Connector; Table 53: 9-Pin Subd Connector Pins - Motorola MTM800 FuG ET Installationshandbuch

88 | Connectors and PIN Assignment
PIN Function
19 GROUND
20 IGNITION
21 ON_OFF_GND
22 EXPANSION_PTT
23
24 HANDSET_AUDIO
25 NC

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
Send Feedback | | 68015000584-J
Description
Ground
Connecting this pin to the ignition line of the vehi-
cle that will automatically turn on the radio if igni-
tion of the vehicle is turned on. High active
This is On/Off control for the old Control Head "J"
(MTM300 Control Head)
Expansion PTT, works together with INT_MIC
Handset audio to earpiece impedance has to be >
200 Ohm
Not Connected
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