Databox Expansion Head (DEH)
You can use 9-pin subD connector of the DEH in the same way as described in Dual Remote Expansion
Head (DREH).
Table 78: 9-Pin SubD Connector Pins
Pin Function Description PC Direction
1 DCD Data Carrier Detect Input
2 RXD Received Data Serial Serial IN
3 TXD Transmitted Data Serial OUT
4 DTR Data Terminal Ready Output
5 GND Ground Output Output
6 DSR Data Set Ready Input
7 RTS Request to Send Output
8 CTS Clear to Send Input
9 RI Ring Indicator Input
4.5.4
10-Pin RJ50 Connector for SIM or Ethernet
Dual Remote Expansion Head (DREH):
You can use the third 10-pin RJ50 connector of DREH (marked as SIM/ETH) to connect to an external
TETRA SIM card reader, or to connect to RJ45 Ethernet network (hardware-ready).
Table 79: Pin Assignment for the Third RJ50 Port (SIM/ETH)
Pin Function Description
1 RS232_RX RS232 Receiver line
2 TX_P_P1 Ethernet transmit positive line, TX+
3 TX_N_P1 Ethernet transmit negative line, TX-
4 RX_P_P1 Ethernet receive positive line, RX+
5 RS232_RTS RS232 Request to Send line
6 GND Main board GND
7 RX_N_P1 Ethernet receive negative line, RX-
8 RS232_TX RS232 Transmitter line
9 RS232_CTS RS232 Clear to Send line
10 FLT_A+ (12 V) This item is the voltage supply for EEH from the
power supply or battery.
MN009998A01-AA
Chapter 4: Connectors and PIN Assignment
105
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