Specifications

Chapter 16 – Audio Commands
Multi-Tech Systems, Inc. AT Commands for EDGE (E1) Modems (S000474A) 270
16.16 AT^SNFS Select Audio Hardware Set
Description: The write command serves to set the audio mode required for the connected equipment.
AT^SNFS is used with AT^SAIC. Activate the audio interface with AT^SAIC and, finally, enter
AT^SNFW to store the settings to your audio profile. To switch back and forth it is sufficient to
use AT^SNFS.
Syntax: Test Command: AT^SNFS=?
Response: ^SNFS: (list of supported <audMode>s)
OK
Read Command: AT^SNFS?
Response: ^SNFS: <audMode>
OK
ERROR
+CME ERROR: <err>
Write Command: AT^SNFS=<audMode>
Response: OK
ERROR
+CME ERROR: <err>
Parameter:
<audMode>
1 Audio mode 1: Standard mode optimized for the reference handset that can be connected to the
analog interface. In audio mode 4, this handset can be used with user defined parameters.
This is the default value if the parameter is omitted (1 will be assumed).
Note: The default parameters are determined for type approval and are not adjustable with AT
commands.
AT^SNFD restores <audMode> 1.
2 Audio mode 2: Customer specific mode for a basic handsfree (speakerphone) device.
3 Audio mode 3: Customer specific mode for a mono-headset.
4 Audio mode 4: Customer specific mode for a user handset.
5 Audio mode 5: Customer specific mode.
6 Audio mode 6: Customer specific mode.
Notes:
• The write command can be used during a voice call to switch back and forth between different modes. This
allows the user, for example, to switch handsfree operation (speakerphone) on and off.
• <outStep> is a global setting. This means that when another audio mode is selected during a call, the value of
<outStep> does not change. This is also true for mute operation, which can be set with AT^SNFM or
AT+CMUT: If the microphone is muted and the user selects another audio mode during the call, then the
microphone remains muted until explicitly changed. Exception: In audio mode 1 <outStep>=4 is fix.
• For use after restart of the module, you are advised to store the selected mode to the audio profile saved with
AT^SNFW. Otherwise, audio mode 1 will be active each time the module is powered up.
• This command is not PIN protected.
• This command is supported in airplane mode.