Siemens TC37 Module At Command Reference page 186

AT Command Set
Message
^SCTM_A: <m>
^SCTM_B: <m>
^SBC: Undervoltage
^SYSSTART
^SYSSTART CHARGE-ONLY
MODE
^SYSSTART ALARM MODE
or, if individual text available:
^SYSSTART ALARM MODE
+CALA: <text>
+CALA: <text>
TC3X_ATC_01_V04.00
Meaning
Battery (A) or board (B) is close to or
beyond critical temperature limit. URC is
issued repeatedly. If <m>=2 or <m>-2,
ME switches off.
Undervoltage of battery detected. ME will
be switched off within a minute.
Indicates that ME has successfully been
started.
Note that this URC will not appear if
autobauding is enabled.
Only applicable to battery operated MEs:
URC indicates that ME has entered the
Charge-only mode.
Charge-only mode allows charging while
ME is detached from network. Limited
number of AT commands is accessible.
Mode can be launched by connecting the
battery charger to the POWER pins of
the ZIF connector, before or after
powering down ME with AT^SMSO.
Note that this URC will not appear if
autobauding is enabled.
Indicates that ME has entered Alarm
mode.
RTC alert set with the AT+CALA
command. Executed when ME has been
powered down. Causes ME to wake up
from Power Down mode. Preventing ME
from unintentionally registering to the
network, Alarm mode allows limited
operation. Limited number of AT
commands is accessible. Do not confuse
with wake-up or reminder call.
Note that this URC will not appear if
autobauding is enabled.
Wake-up or reminder call set with
AT+CALA command. Executed while ME
is in normal operation. Do not confuse
with Alarm mode.
Page 186 of 204
How to activate
URC
AT^SCTM=1
AT^SBC=<current>
Not defined by user
Not defined by user
Enabled when you
configure Alarm
mode
Enabled when you
set wake-up call
29.05.2002