LED Not Lit
If the LED on your Siretta modem is not lit, please check the following procedures:
» Check the modem has been connected to the correct power supply
» Check the power connector is inserted correctly
» Check the power has been switched on at the mains
» Check the LED functionality has been set with either AT#SLED or AT#GPIO AT commands
Modem Reboot
If you Siretta modem keeps manually rebooting, please check the following procedures:
» Check the SIM card has been inserted
» Check the SIM card has been inserted correctly
» Check the power supply is correctly specified or you are using an approved Siretta PSU
No Serial Connection
If you Siretta modem has no serial connection, please check the following procedures:
» Check the serial cable has been inserted correctly
» Check the serial cable has the correct pin alignment (see below)
» Check the modem emulator program has the proper settings (Factory settings = 115200, 8, n, 1)
» Check there isn’t another program interfering with the communication program
» Check there isn’t a conflict with communication port access
‘No Carrier’ Message
If your Siretta modem returns a ‘No Carrier’ message upon an attempted call (voice or data), please consider the following possible causes:
