Operator search is performed every 15 minutes. Depending on current GSM
operator, Home, Roaming or Unknown mode can be changed faster than every
15 minutes. This process is separate from operator search. Movement criteria
are checked every second.
Figure 20 Data Acquisition Mode configuration
‘Min Saved Records’
defines the minimum number of coordinates and I/O data
that should be transferred with one connection to the server. If DB3 Plug&Play
does not have enough records to send to the server, it will check again after
the time interval defined in ‘Sending Period’.
Send period
– GPRS data sending to server period. The module makes attempts
to send collected data to the server every defined period. If it does not have
enough records (depends on parameter Min. Saved Records described above),
it tries again after the defined time interval.
GPRS Week Time tab
– most GSM billing systems charge number of bytes
(kilobytes) transmitted per session. During the session, DB3 Plug&Play makes
the connection and transmits data to a server. DB3 Plug&Play tries to handle
the session as much as possible; it never closes session by itself. The session
can last for hours, days, weeks or session can be closed after every connection
in certain GSM networks – this depends on GSM network provider. GPRS
Context Week Time defines session re-establish schedule if the session was
closed by the network. New GPRS context is opened if time is 10 minutes till
time checked in the table. Therefore if all boxes are checked, DB3 Plug&Play is
able to open new connection anytime. At scheduled time match DB3 Plug&Play