User manual

12
2.2.1 GT864 Quad with Audio connector
The USB connector supports the connectivity of a headset or any other audio equipment using
the analogue microphone and loudspeaker interface of GT864-QUAD Terminal. The table below
describes the signals on the USB connector.
GT864 QUAD Pin Layout for Mini USB connector:
Figure 5: Mini USB Type A/B connector
Pin
Signal
Colour
1
MIC -
Yellow
2
EAR -
Red
3
MIC +
White
4
EAR +
Turquoise
5
(GND – not necessary for audio)
Black
Table 4: GT864 Quad Signal Colour
The colours of the cable are only for the cable delivered by company CEP! If you
use other cable, please check the pinning before!
Voice Features – please read the AT command manual for integration:
 Telephony, Emergency call
 Half rate, full rate, enhanced full rate and adaptive multi rate voice codec
(HR, FR, EFR, AMR)
 Superior Echo cancellation & noise reduction
 DTMF
2.2.2 GT864 PY with GPIO
At the mini USB connector are 4 inputs, with the following technical description:
 max. voltage VIN is 30V