Rainbow Electronics FARGO MAESTRO 100 (with TCP_IP) - Manual (Page 16)

Confidential, the whole present document is the sole property of Maestro Wireless
Solution Limited.
15
CHAPTER 6: TROUBLESHOOTING
1. The modem’s LED does not light
Check if the modem has been properly connected to a 5 - 32V power supply
Check if the power connector is properly inserted
Check the fuse on the power cord
2. The modem’s LED lights but does not blink long time
after power up
Check if a valid SIM card has been properly inserted
Check if the SIM card has been locked (refer to AT+CPIN command in AT command
guide)
Check if the external has been properly connected to the modem
Check if the network coverage is available
3. The modem does not respond to the terminal program
Check if the RS232 cable has been properly connected
Check if your program has proper settings. Factory setting of the modem is:
ƒ 115200 (9600bps for Maestro 100 Eco)
ƒ 8 data bits
ƒ No parity bit
ƒ 1 stop bit
4. No voice could be heard for the modem’s speaker output
when a call is answered
Make sure a voice call has been made (refer to AT command guide)
Enter the AR+SPEAKER=1 command