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Applicant: Motorola, INC
TABLE 14 – Advanced mode commands
Command
AT+MAPATH
AT+MAFEAT
AT+MAVOL
AT+MMICG
AT+MADIGITAL
2.8.8
Audio Programming Interface
The module incorporates an audio programming interface, through AT commands, which controls the
following audio features:
Audio Path – Defines the input and output devices for speech, DTMF tones, rings and alerts.
Audio Gain – Defines the amplification (gain) level for input and output audio devices.
Audio Algorithm – Defines the speech processing features for voice calls.
2.8.8.1
The module's audio interface support speech processing algorithms for echo suppression, noise
suppression and side-tone feedback
Enabling or disabling the algorithms can be configured separately for each audio path and operating
mode through the AT command interface.
The module supports the following speech coding algorithms:
Description
Sets the input device for voice, and the output
devices for voice, DTMF tones, rings and
alerts.
Enables and disables the speech processing
algorithms – Echo suppression, noise
suppression and sidetone.
Sets the gain (amplification) level of the
selected analog output device.
Sets the gain (amplification) level of the
selected analog input device.
Switches between analog and digital audio
paths.
Audio Algorithms
Motorola General Business Use
Page 27 of 36
FCC ID: IHDP56JE1
C24 Hardware Interface Manual
Version 0.3
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