Chapter 3: AT Commands Reference
April 15, 2008 G24-L AT Commands Reference Manual 3-141
+CFUN, Shut Down Phone Functionality
This command shuts down the phone functionality of smart phones and PDAs with phone
capabilities in order to prevent interference from a nearby environment. This enables other
functionality to continue to be used in environments where phone use is either impractical or not
permitted. For example, on airplanes the use of Transceiver modules is forbidden during the
entire flight, but the use of computers is allowed during much of the flight. This command
enables other functionality to continue while preventing use of phone functionality.
The following table shows the AT+CFUN parameters.
Examples
AT+CFUN=?
+CFUN: (0-4), (0-1)
OK
AT+CFUN?
+CFUN: 0
OK
AT+CFUN=4 //Disable phone transmit and receive RF circuits
Ok
Command
Type Syntax Response/Action Remarks
Set
AT+CFUN=[<fun>
[,<rst>]]
OK
+CME ERROR: <err>
The Set command selects the level of
functionality <fun> in the smart phone or
PDA incorporating the G24-L.
Read
AT+CFUN? +CFUN: <fun>
OK
The Read command displays the current
level of functionality.
Test
AT+CFUN=? +CFUN: (list of
supported <fun>s), (list
of supported <rst>s)
OK
The Test command displays the list of
supported functionality settings.
Table 3-92: +CFUN Parameters
<Parameter> Description
<fun> Functionality levels:
0, 1 Full functionality (default 0)
4 Disables phone transmit & receive RF circuits
5-127 Reserved for future use
<rst> 0 Sets functionality to <fun> without resetting the device (default)
1 Resets the device before setting functionality to <fun>
