You can choose a few types of sleep modes: GPS sleep, Deep sleep, Online Deep sleep and Ultra sleep mode. At every sleep mode you need to configure it’s timeout parameter (defined in minutes) to start counting when device will go on sleep mode when it’s on STOP.
GPS Sleep mode: your device will go to sleep but still it will make new periodic records and you can get SMS messages with this mode being activated and will save power about 20 times from norminal.
Deep Sleep mode: after it’s go to sleep mode it won’t generate new records and you won’t woke up your device via SMS function.and will save power about 30 times from norminal.
Online deep sleep mode: your GSM part will be activated you can receive or send SMS and make and receive calls that makes so this increases your power consumption but it works like Deep sleep mode and will save power about 25 times from norminal,
Ultra sleep mode will turn off your GSM and GNSS modems and reduce the power surge on I/O,
In conclusion we strongly recommend to use GPS sleep mode or deep sleep mode to get records and SMS messages when device will sense any movement by movement source or movement sensor is detected or Ignition (configured Ignition Source) is turned on.
For additional information about sleep modes you can find at: https://wiki.teltonika.lt/index.php?title=FMB920_Sleep_modes