Configuring The A753 Connection Settings - Adcon A753 User Manual

GPRSDNS "[ipaddress]"
Note: When using an Internet firewall in front of the LAN where the A850
Telemetry Gateway resides, be careful to properly configure the
firewall and the GPRSCONNADDR parameters [a850-ipaddress] and
[portnumber]. This is particularly important if you use NAT (network
address translation) on your firewall.
You should also understand that a "home-grade" router may be not
sufficient for this application. Adcon strongly recommends that you
use professional router equipment.
Configuring the A753 Connection Settings
Use the following commands to define the intervals the A753 will wake
up and connect to the A850 Telemetry Gateway:
GPRSCONNALIGN [align]
GPRSCONNINT [interval]
GPRSSECRET [secret]
GPRSTMOUT [interval]
After entering all parameters correctly, you can check your settings at
any time by entering the INFO 2 command. With the GPRS
parameters set, the response will be similar to the following:
# INFO 2
42395 INFO
Features:
GSM timeout:
GPRS timeout:
Access point:
Connect interval: 120 0
Connect to:
where [ipaddress] is the DNS server address of your
GPRS network operator (optional)
Alignment of calls in seconds (default: 0, i.e. 00:00 =
midnight). This parameter is used to spread the
connections in time to avoid overloading your router or
gateway, which is necessary for large-scale networks.
Interval in seconds between two connection attempts
(default: 3600).
This 32-bit integer (0 -4294967295) has to be set for
the A753 and the gateway. The integer is a shared
"secret" or password used as a lock-out mechanism to
avoid connections to foreign gateways.
Idle timeout in seconds (default: 3600); connections
that are idle this long will be terminated by the A753.
This helps to detect silently deceased TCP connections.
none
40
3600
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CHAPTER 2
Installing the RTU