Specifications

2.7 Audio Interface
The audio interface provides one analog input for a microphone and one analog output for Speaker.
• The microphone input not balanced.
• The Speaker output is balanced.
• For electret microphone a supply source is implemented by the G24 Modem.
• For speaker 3W amplifier implemented output 4ohm.
Figure 13: Audio RJ11 plug (6-pole female)
Figure 14: Audio block diagram
For more Audio command refer to G24 AT command guide page 319
2.7.1 Supported Audio Modes
The audio interface can be configured by inserting the 2.5mm Jack the Audio will be connected to the
Headset, when this jack is out Audio will connected to RJ11 output.
Java Box Terminal Hardware Interface Description
Released
Pin assignment
1 – GND
2 - Microphone-
3 - Speaker 4ohm 3w
4 - Speaker 4ohm 3w
5 - Microphone+
6 - 3.8V
1 2 3 4 5 6
Sample Commands for Java Box Audio operation
1
AT+CLVL= 0 - 7 Speaker Gain
2
AT+MMICG= 0 - 31 Microphone Gain
6
5
4
3
2
1
MIC +
Speaker +
Speaker -
MIC -
EAR_HF+
EAR_HF-
MIC_HF+
MIC_HF-
3W
AMP
SPKR_N pin 67
SPKR_P pin 69
MIC pin 61
MICN pin 16
Java Box
3.8V
RJ11
GND