This function block allows the operation of a GSM modem connected to the device.
The FB manages the dialogue with the modem, performs the initialization, check the modem status, and if the modem is connected to the GSM network, it returns the operator and the RSSI signal level.
In case the modem releases from the network, the FB shall keep the re-hang up automatically.
Available with activation at MID or DID level.

The function block is part of a set of management functions and FB modem that includes:

• ModemCore, Modem core management
• ModemSMSReceive, receive an SMS message
• ModemSMSRxCmd, receive an SMS command
• ModemSMSSend, send an SMS message