* The difference between ''Send Period'' ([[FMB120 Data acquisition settings|Data Acquisition Mode settings]]) and ''Open Link Timeout'' must be more than 90, so that FMB120 could close GPRS link within at least 90 seconds; | * The difference between ''Send Period'' ([[FMB120 Data acquisition settings|Data Acquisition Mode settings]]) and ''Open Link Timeout'' must be more than 90, so that FMB120 could close GPRS link within at least 90 seconds; |