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| org.freedesktop.ModemManager1.Modem.Voiceorg.freedesktop.ModemManager1.Modem.Voice — The ModemManager Voice interface. | 
ListCalls (OUT ao result); DeleteCall (IN o path); CreateCall (IN a{sv} properties, OUT o path);
The Voice interface handles Calls.
This interface will only be available once the modem is ready to be registered in the cellular network. 3GPP devices will require a valid unlocked SIM card before any of the features in the interface can be used.
ListCalls (OUT ao result);
Retrieve all Calls.
This method should only be used once and subsequent information retrieved either by listening for the org.freedesktop.ModemManager1.Modem.Voice::Added signal, or by querying the specific Call object of interest.
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 | The list of call object paths. | 
DeleteCall (IN o path);
Delete a Call from the list of calls.
The call will be hangup if it is still active.
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 | The object path of the Call to delete. | 
CreateCall (IN  a{sv} properties,
            OUT o     path);
Creates a new call object.
The 'Number' is mandatory
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 | Call properties from the Call D-Bus interface. | 
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 | The object path of the new call object. |