To check the connection:
1.Switch ON the terminal.
2.Check the LED status indicators in the red circle on the modem.
LED Status indicator
The LED indicator is located on the top of the expansion board and visible when mounted on the main board.
RED Registered in the GSM network. Should always be ON.
YELLOW Connected to the GPRS network. Should always be ON.
GREEN Connected to GPRS network and ready to communicate with the WebOffice gateway.
The LED will be turned off when the modem is powered off. If no LED is lit and the modem is powered on, the SIM is not valid or an incorrect PIN code has been entered in the terminal configuration.
Blinking pattern
10 ms on / 1990 ms off Modem has an active PPP-connection (GPRS and UMTS) and is ready to communicate.
10 ms on / 3990 ms off Modem registered to a network. No call, no data transfer active.
500ms on / 500 ms off Limited Network Service (e.g. because no SIM, no PIN or during network search)
