User manual

11
2.2.1 GT864 E 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 E Pin Layout for Mini USB connector:
Figure 5: Mini USB Type A/B connector
PIN
Signal
Color
1
MIC -
Yellow
2
EAR -
Red
3
MIC +
White
4
EAR +
Turquoise
5
(GND – not
necessary for audio)
Black
Table 3: Mini USB Signal Color
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
2.3 Antenna Connector
The antenna connector allows transmission of radio frequency (RF) signals between the
modem and an external customer-supplied antenna. The modem is fitted with a 50Ω, FME
male coaxial jack.