Calixto xE910, User Manual, Page: 10 / 16

5.6 RS232-DB9 (J3)
This DB9 connector has main UART of the xA910 module in RS232 level. There is also DCD, RING pins from the
module in RS232 level. There is also GSM_RESET, ON_OFF input signals to GL86x module at 0-3.6 V level
directly to this DB9 connector. These extra pins allow customers to utilize the xE910 module completely.
Pin No PIN Name Pin Type Signal Type Description
1 DCD O RS232 DCD PIN. Coming from xE910
module. This gives server
connectivity status.
2 TXD O RS232 Transmit Data of RS232
3 RxD I RS232 Reception Data for UART
4 ON_OFF I 0 to 3.6 (Typical
3.3) ON/OFF PIN OF the module
5 GND Gnd Ground
6 MODULE_RESET I 0-3.6 V (Typical
3.3) Reset PIN of xE910 module.
Active High. (20 ms High Pulse
for reset)
7 CTS O RS232 Clear to Send
8 RTS I RS232 Request to Send
9 RING O RS232 RING PIN. Coming from xE910
module. Notification status for
SMS and call.
5.7 Expansion Connector Slot (J14)