MC55 AT Command Set
2.9 AT^SMSO s
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MC55_ATC_V01.05 Page 44 of 469 2/10/04
Confidential / Released
2.9 AT^SMSO Switch off mobile station
Syntax
Unsolicited Result Code
^SHUTDOWN
Indicates that the power-off procedure is finished and the module will be switched of f within 1 second
Command Description
The exec command initiates the power-off procedure. Low level of the module's VDD pin and display of URC
"^SHUTDOWN" verifies that the procedure has completed and the module has entered t he POWER DOWN mode.
Therefore, be sure not to disconnect the operating voltage until VDD is low or until URC "^SHUTDOWN" is dis-
played . Otherwise, you run the risk of losing data. For further details on how to turn off th e module see the [2].
Notes
• Do not send any command after this command.
• If AT^SMSO is entered on one of the Multiplexer channels the ME closes th e Multiplexer channels, terminates
the Multiplexer and deactivates all other functions. Then, the URC " ^SHUTDOWN" will be issued on the phys-
ical 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.
Test Command
AT^SMSO=?
Response(s)
OK
Exec Command
AT^SMSO
Response(s)
^SMSO: MS OFF
OK
PIN ASC0 ASC1 MUX1 MUX2 MUX3
! % % % % %
Reference(s)
SIEMENS