The process of requesting to connect or disconnect the modem is now split into two operations: creating a bearer with CreateBearer() in the org.freedesktop.ModemManager1.Modem interface and getting the bearer connected with Connect() in the org.freedesktop.ModemManager1.Bearer interface. These two steps are equivalent to the old Connect() method in the previous org.freedesktop.ModemManager.Modem interface.

The old Disconnect() method in the previous org.freedesktop.ModemManager.Modem interface is therefore also applied in a per-bearer basis through the new Disconnect() in the org.freedesktop.ModemManager1.Bearer interface.

This logic of splitting the connection logic allows ModemManager to create multiple bearers that may be connected to e.g. different access points (if the modem allows it).