CONNECTOR PIN FUNCTIONS MTM700 Mobile Radio / Detailed Service Manual A - 9
6 DSR Data Set Ready Input
7 RTS Request to Send Output
8 CTS Clear to Send Input
9 RI Ring Indicator Input
Pin Function Description
1 GND Ground
2 RS232_SCI_TX Transceiver data (RS232 line with RS232 level)
3 RS232_SCI_RX Receive data (RS232 line with RS232 level)
4 RS232_RTS Request to Send (RS232 line with RS232 level)
5 RS232_CTS Clear to Send (RS232 line with RS232 level)
6 FLT_A+ Filtered unswitched UB+ / 200mA
7 Signal_GND Ground for RS232
8 SB9600_BUSY SB9600 busy
9 NC Not Connected
10 NC Not Connected
11 NC Not Connected
12 SW_B+ Switched UB+ / 100mA
13 SB9600_BUS- SB9600 BUS-
14 ON_OFF_CONTROL /
FLASH_MODE
-Switch into flash mode (connect pin14 with 6)
-On/Off control for Std. Control Head
15 SB9600_BUS+ SB9600 BUS+
16 INT_MIC Microphone analogue input of 80mVRMS, 600ohm impedance, 9V=
17 SB9600_RESET Reset; its a output to reset a SB9600 device
18 NC Not Connected
19 GROUND Ground
20 IGNITION Connecting this pin to the ignition line of the vehicle that will automati-
cally turn on the radio if ignition of the vehicle is turned on. High active;
21 ON_OFF_GND On/Off control for Control Head "J"(MTM300 C/H)
22 EXPANSION_PTT Expansion PTT, works together with INT_MIC
23 SB9600_SW switched into SB9600 mode if connected to 12V
24 HANDSET_AUDIO Handset audio to earpiece impedance has to be > 200 Ohm
25 NC Not Connected
Table 25 Pin Assignment of the 25 Pin subD Connector of the Expansion Head
Table 24 Pin Assignment of 9 Pin subD Connector of the Expansion Head
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