Rs232 Serial Port; Serial Data - insys icom GPRS mini Manual

INSYS GPRS mini
4.4

RS232 Serial Port

The modem supports a standard RS232 serial interface via its 9 pin Sub-D
connector, shown below. In line with serial communication terminology the
INSYS GPRS mini should be considered as the
equipment
(DCE) and the external application or computer as the
nating equipment
INSYS GPRS mini is 230400 kbit/s.
The electrical characteristics of the serial port signals are shown below:
PIN Signal
1 DCD
2 RD
3 TD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
4.5

Serial Data

The modem supports the standard data character format of
 Programmable baud rate (300bps to 230,400bps).
 Auto-configuration mode with auto-baud (1,200bps to 230,400bps).
 Multiplex ability according to GSM 07.10 Multiplexer Protocol.
(DTE). The maximum baud rate to communicate with the
Direction
Output
Output
Input
Input
-
Output
Input
Output
Output
data circuit-terminating
Voltage levels
> + 4V
<- 4 V
> + 4V
<- 4 V
> + 2,4V
< 0.8 V
> + 4V
< 0.8 V
0 V
> + 4V
< - 4 V
> + 2,4V
< 0.8 V
> + 4V
< - 4 V
> + 4V
< - 4 V
Electrical Description
data termi-
Description
Data carrier detect
Received data
Transmitted data
Data terminal ready
Ground connection
Data set ready
Request to send
Clear to send
Ring indicator
19