insys icom GSM small 2.0 Manual page 60

Functions
11.12.4.1 Change into Power-Down Mode
Configuration with HSComm
A configuration of this function using the HSComm software is not pos-
sible.
Configuration with AT commands
In order to enable power-down mode, use
the command
The INSYS GSM small 2.0 indicates at the
interface

The command AT^SMSO has another function besides shutting down
the GSM engine. Some of the extended AT commands can only be
saved using this command (AT^SCFG, AT+CSNS, AT^SCKS, AT+CALA).
Therefore, it is required to wait for the response ^SHUTDOWN after en-
tering AT^SMSO, before disconnecting the power supply.
Because data is written into the non-volatile memory of the GSM engine
with each shutdown via AT^SMSO, the maximum number of shutdowns
is limited to 100,000.
11.12.4.2 Power-Down RTC-Alarm Mode
Since the internal real-time clock (RTC) continues to operate in power-down mode,
the alarm function of the RTC (AT+CALA) can be used to change the INSYS GSM
small 2.0 from power-down into RTC alarm mode.
If a configured RTC alarm occurs during the INSYS GSM small 2.0 is in power-
down mode, the RTC alarm mode is entered with the message:
^SYSSTART ALARM MODE
[+CALA: <text>]
If a text has been configured via additional parameters with the command AT+CALA,
this is indicated in the second line of the message.
If an alarm occurs, the alarm time configured with AT+CALA will be deleted and can
be configured again in RTC alarm mode.
Only a very limited operation is possible in this mode; the following AT commands
can be used:
AT+CCLK (configuring time/date)
AT+CALA (configuring alarm time)
AT^SMSO (change into power-down mode)
11.12.4.3 Exiting the Power-Down Mode
Exiting the power-down mode is only possible by a reset via the reset input of the
INSYS GSM small 2.0 (refer to the sections Connections or Resetting the Device).
60
INSYS GSM small 2.0
AT^SMSO
^SMSO: MS OFF
OK
^SHUTDOWN