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AC75 Hardware Interface Description

Strictly confidential / Preliminary

AC75_HD_V00.202 Page 23 of 120 27.04.2006

Airplane mode Airplane mode shuts down the radio part of the module, causes the module to

log off from the GSM/GPRS network and disables all AT commands whose

execution requires a radio connection.

Airplane mode can be controlled by using the AT commands AT^SCFG and

AT+CALA:

• With AT^SCFG=MEopMode/Airplane/OnStart the module can be configured

to enter the Airplane mode each time when switched on or reset.

• The parameter AT^SCFG=MEopMode/Airplane can be used to switch back

and forth between Normal mode and Airplane mode any time during

operation.

• Setting an alarm time with AT+CALA followed by AT^SMSO wakes the

module up into Airplane mode at the scheduled time.

Charge-only mode Limited operation for battery powered applications. Enables charging while

module is detached from GSM network. Limited number of AT commands is

accessible. Charge-only mode applies when the charger is connected if the

module was powered down with AT^SMSO.

Charge mode

during normal

operation

Normal operation (SLEEP, IDLE, TALK, GPRS/EGPRS IDLE, GPRS/EGPRS

DATA) and charging running in parallel. Charge mode changes to Charge-only

mode when the module is powered down before charging has been completed.

See

Table 11 for the various options proceeding from one mode to another.

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Siemens AC75 Specifiche Pagina 23