INSYS GPRS 5.1 serial
Connections, Display and Control Elements
97
13.1
Serial Interface
Layout of the 9-pin D-SUB jack
Description of the signals on the 9-pin D-SUB connector on DCE side:
9-pin D-Sub DCE
Pin No.
Description
Function
CCITT
V-24
EIA
RS232
DIN
66020
E/A DCE to DTE
1
DCD
Data Carrier Detect
109
CF
M5
O
2
RXD
Receive Data
104
BB
D2
O
3
TXD
Transmit Data
103
BA
D1
I
4
DTR
Data Terminal Ready
108
CD
S1
I
5
GND
Ground
102
AB
E2
6
DSR
Data set ready
107
CC
M1
O
7
RTS
Request to send
105
CA
S2
I
8
CTS
Clear To Send
106
CB
M2
O
9
RI
Ring Indication
125
CE
M3
O
13.2
SIM Card
The INSYS GPRS 5.1 serial requires a 3V/1.8V SIM card from a GSM provider for
operation. The SIM card is the identification for the network provider.
The SIM card must be placed into the carrier with the contacts downward to en-
sure that the contacts are on top of each other.
Change the SIM card only when the device is switched off.