The "PropertiesChanged" signal

PropertiesChanged (a{sv} properties);

The "ModemCapabilities" property

ModemCapabilities  readable   u

The generic family of access technologies the modem supports. Not all capabilities are available at the same time however; some modems require a firmware reload or other reinitialization to switch between eg CDMA/EVDO and GSM/UMTS.

Returns: NMDeviceModemCapabilities

The "CurrentCapabilities" property

CurrentCapabilities  readable   u

The generic family of access technologies the modem currently supports without a firmware reload or reinitialization.

Returns: NMDeviceModemCapabilities