If a multi-operator SIM is used, Bjong independently excludes operators with whom repeated
transmission errors are obtained, to optimize transmission times. For this reason, with this
type of SIM, the operator selection must be set to automatic.
Even if the 3G network is faster than 2G, it guarantees better performance only in the case of
transmission of large quantities of data (e.g. video) in good network coverage conditions.
Given the relatively small amount of data that the instrument must send, it is often suggested
to use 2G network, much more reliable even in the case of low network coverage or
installation in very shielded places such as inside manholes. The decision to no longer support
the 3G network is also dictated by the imminent switch-off already predict by the various
network operators.
12.11.4 Functional test
Bjong can perform a modem test to check that it is able to connect properly
to the network. The test result provides: the operator, the network, the
coverage signal and the registration. The test phases are displayed in a
window.
At the end of the test, the following information are displayed:
✓ CSQ: coverage signal in thirtieths; the minimum signal level for the instrument to attempt to send
data is 5. A signal greater than 12 is considered good.
✓ R: the second digit after the comma indicates the type of registration: 1 = registered to the
national network, 5 = registered in roaming, different values identify a failure to register to the
network.
✓ Operator and network type.
Bjong can perform a data transmission test, according to the set parameters.
The steps of the submission process are displayed in a dialog box. The
different steps are: “SEND DATA” in which the instrument sends the data
packet, “WAIT REPLY” in which it waits for the response from the server to be
received and “CHEK NEW JOB” in which the instrument verifies that there is new data to send.
Bjong can perform a test of sending SMS to the user numbers set in “Alarms
and events” (see).
The operator can verify the receipt of the SMS containing the test string and
date / time.
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