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CHAPTER 3
Configuring the Gateway
GPRS Modems
•
Slot interval - interval for saving data from the internal sensors
of the respective Wireless Modem, in seconds (minimum is 60
seconds, maximum is 10800 seconds and the default is
900seconds, or 15 minutes);
•
Ping interval - the interval within a status request from the
Wireless Modem should be made (minimum is 60 seconds,
maximum is 10800 seconds and the default is 900seconds, or
15 minutes);
•
First slot - displays the time stamp of the oldest data of the
Wireless Modem after the last configuration;
•
Last slot - displays the time stamp of the newest data of the
Wireless Modem after the last configuration.
In case of a GPRS modem, there is no real hardware installed on
the A850. Instead, the gateway listens on a specified port for TCP
connections from GPRS based RTUs, leaving the interfacing
between GPRS and the TCP network to the GPRS phone providers.
Note: as long as you don't get your own private access point by
your GPRS provider, the A850 gateway must be accessible
from the internet, either directly or by using an SSH server as
proxy..
The time being, only RTUs of the type A733GSM can be reached
via a GPRS modem.
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