Applicant: Motorola, INC
Audio Operating Modes
The module's audio interface includes 2 modes of operation. Each operating mode defines the audio
input and output devices to be used for each audio sound type and their programmable settings.
Basic audio mode is the module's default power-up audio configuration. Several audio paths are available
in this mode, and their settings can be programmed through the AT command set.
The following table describes the available audio paths in Basic mode.
TABLE 13 – Basic mode audio paths
An expanded AT command set enables to define a specific audio path and setting, which are not part of
the default configuration, for each type of audio sound (speech, DTMF tones, rings and alerts).
The following table describes the advanced mode audio programming features. These features are only a
part of the complete advanced audio AT command set.
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Default audio path for speech and DTMF
Alternate path for headset device.
Enable by setting HDST_INT_N
interface signal low.
Default alert and ringer loudspeaker
Enable digital path by
FCC ID: IHDP56JE1
C24 Hardware Interface Manual