13
GND
GPIO_4 OUT
GPIO_2 IN
GPIO_3 OUT
GPIO_1 IN
RJ-11 (Extension)
Port
To connect the analogue handset.
Serial Port
Earphone jack
Power ON/OFF
NMEA Port
3.5mm Audio
Port
This is the system voice port, which could connect a loud speaker to play the calling
voice.
NMEA Port
For sending GPS signal in NMEA format (GLL, RMC protocol) to 3rd party devices.
Serial Port
This is RS232 port for 9 wired (TXD, RXD, CTS, RTS, DTR, DSR, DCD, RI and GND). It is for
communication module maintenance, Firmware upgrade, GmPRS service usage and
3rd party device integrations. For more information, please contact your distributor.
Power ON/OFF
button
This is the system power On/Off switch.
