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6.3.2.1
Operator list
Clicking the
Options
button in the
Operator list
section will open the
Operator list
settings. Here you
can configure operator acquisition settings.
GPRS Attempt
–
how many times the device will try to connect to the operator’s GPRS before trying a
different operator.
GPRS data counter
–
how many bytes of data the device should send before performing another
operator search.
Temporary blacklist
–
temporal ban period in seconds. Sometimes, when the FM device connects to
an operator with unavailable GPRS, the device is connected, but cannot transmit any data to the server.
In such cases the temporary blacklist is used. The operator with unavailable GPRS is put into the
temporary blacklist, which prevents the FM device from connecting to this operator during the next
operator search.
In some cases, the device connects to the operator and successfully obtains GSM and GPRS signals but
records still do not reach the server. The device may work around the faulty network (i.e. when network
connection is lost) by putting this operator into the temporary blacklist. 2
nd
level temporary blacklist logic
is used in this case. Network verification is done as follows:
1.
The device performs server pinging if there is no response (no ACK) from the server and if the
connection to server is not available.
2.
It will make up to 3 separate pinging attempts. If any of these attempts are successful, the network
will be verified. In an ideal case, the server responds after the first attempt, the network is verified,
and no more pinging operations are needed.
3.
If the server fails to respond to all 3 attempts, the device will switch to another operator and put
the current operator into the temporary blacklist.
Key points about the temporary blacklist:
The ban period is configurable. When all operators get into the blacklist, the blacklist is cleared.
Banned means that the device was unable to connect to the operator or the server failed to
respond to 3 consecutive ping requests.
The blacklist is cleared after device reset or power off.