The set command sets the supported system modes of the modem. The command configuration is
stored to Non-volatile Memory (NVM) approximately every 48 hours and when the modem is
set to minimum functionality mode with the +CFUN=0
command.
Active %XPOFWARN warning blocks the storing to NVM.If the modem detects a conflicting band lock and operator
restrictions in at least one system, this means that there are no usable bands in that
system and the command returns ERROR and +CME ERROR code
522.
Note:
- Only one supported LTE mode is allowed at a time.
- Both the LTE-M and Narrowband Internet of Things (NB-IoT)
system modes can be configured and enabled.
- This command is allowed only before activating the modem using the
+CFUN=1 command. If the mode needs to be changed, enter Minimum
functionality mode using the +CFUN=0 command or set it to flight mode
using the +CFUN=4 command.
- Operator configurations can override values set by the user.
Syntax:
%XSYSTEMMODE=<LTE_M_support>,<NB_IoT_support>,<GNSS_support>,<LTE_preference>
- +CME ERROR code
- 518 – Not allowed in active state.
- 522 – Band configuration not valid for selected mode.
The set command parameters and their defined values are the following:
- <LTE_M_support>
- 0 – LTE-M not supported
- 1 – LTE-M supported
- <NB_IoT_support>
- 0 – NB-IoT not supported
- 1 – NB-IoT supported
- <GNSS_support>
- 0 – Global Navigation Satellite System (GNSS) not supported
- 1 – GNSS supported
- <LTE_preference>
- 0 – No preference. Initial system selection is based on history data and
Universal Subscriber Identity Module (USIM). If history data or USIM configuration are not
available, LTE-M is prioritized in the initial system selection.
- 1 – LTE-M preferred.
- 2 – NB-IoT preferred.
- 3 – Network selection priorities override system priority, but if the same network or
equal priority networks are found, LTE-M is preferred.
- 4 – Network selection priorities override system priority, but if the same network or
equal priority networks are found, NB-IoT is preferred.
-
Note: If <LTE_preference> is set to a non-zero value,
<LTE_M_support> or <NB_IoT_support>
or both must be set.
The following command example sets LTE-M and GNSS as the system modes. No preferred
LTE mode set:
AT%XSYSTEMMODE=1,0,1,0
OK