VEGA INSYS Modem GPRS 5.0 - Manual (Page 91)

INSYS GPRS 5.0 serial GPRS General
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8.8 Calculation Examples for Data Transmission via GPRS
8.8.1 Application description
8.8.1.1 Design of the entire system
Data logger
INSYS
GPRS
DEVICE
RS232
GSM/GPRS Net Internet
DSL / Modem
INSYS
vitual
COM-
Port
control center
software
control center computer
The system consists of a data logger with 8 digital inputs and 4 analogue inputs.
The received data can be output in adjustable intervals at the RS232 interface.
The evaluation software at the control center computer will either communicate
directly with the data logger via the RS232 interface, or via leased line modems
for remote applications.
To save investment and maintenance costs (rent, ...) when using leased line mo-
dems, the connection should be made via a transparent GPRS modem.
This is what the INSYS GPRS 5.0 serial is used for. It is also used for leased line op-
eration, i.e. after being switched on it will automatically attempt to establish a
connection with the remote terminal, the INSYS virtual COM port. As soon as the
connection is established, all user data from and to the data logger are transmit-
ted via a transparent TCP/IP connection. No adjustment is required for the data
logger and the control center computer.