> 2.10 | AT^SMSO Switch off mobile station

> AT^SMSO initiates the power-off procedure. High level of the module's PWR_IND pin and the URC "^SHUTDOWN" notify that the procedure has completed and the module has entered the POWER DOWN mode. Therefore, be sure not to disconnect the operating voltage until PWR_IND is high or until the URC "^SHUTDOWN" is displayed. Otherwise, you run the risk of losing data. For further details on how to turn off the module see the [2].
> Syntax

> Test Command AT^SMSO=?
> Response(s)
> OK

> Exec Command AT^SMSO
> Response(s)
> ^SMSO: MS OFF
> OK
> ERROR

> Reference(s) |  | PIN |  | ASC0 | ASC1 | USB | MUX1 | MUX2 | MUX3 |  |  | Charge | Q | Last
> SIEMENS |  | - |  | + | + | + | + | + | + |  |  | - | + | +

> Unsolicited Result Code
> ^SHUTDOWN
> Indicates that the power-off procedure is finished and the module will be switched off in less than 1 second.
> Notes

> • | Do not send any other AT command after AT^SMSO.

> • | If AT^SMSO is entered on one of the Multiplexer channels the ME closes the Multiplexer channels, terminates the Multiplexer and deactivates all other functions. Then, the URC "^SHUTDOWN" will be issued on the physical serial interface (ASC0). The URC will be transmitted at the bit rate last activated on ASC0 for use with the Multiplex driver.

> • | If both interfaces ASC0 and ASC1 are connected the URC appears on both of them.

> • | If the module is in NORMAL mode and the charger is connected to the VCHARGE line, the AT^SMSO command causes the module to shut down shortly and then start into the CHARGE ONLY mode. If the module is in CHARGE ONLY mode the AT^SMSO command is not supported at all. In both cases, the module can only be switched off by disconnecting the charger. See also [2].