CEP AG
Revision 1.2
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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 V
IN
is 30V
low level: 0...1V
high level: 12…30V
ESD protected
under full control of embedded application
GT864 PY Pin Layout for Mini USB connector:
GT864 PY GPIO
GT864 PY PIN
Mini USB
Mini USB PIN
GPIO 11
D1
IN1
1
GPIO 12
G4
IN2
2
GPIO 13
K10
IN3
3
GPIO 14
B4
IN4
4
-
-
GND
5
All inputs are under control of an embedded application script or at-commands!
The following commands have to be used to initialise and to read the status of the
GPIOs:
at#GPIO=11,2,0
(read GPIO11, PIN1 Mini USB)
at#GPIO=12,2,0
(read GPIO12, PIN2 Mini USB)
at#GPIO=13,2,0
(read GPIO13, PIN3 Mini USB)
at#GPIO=14,2,0
(read GPIO14, PIN4 Mini USB)
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
50 , FME male coaxial jack.
Output Power:
