The /org/freedesktop/ModemManager/Modems objects

org.freedesktop.ModemManager1.Modem — The ModemManager Modem interface.
org.freedesktop.ModemManager1.Modem.Simple — The ModemManager Simple interface.
org.freedesktop.ModemManager1.Modem.Modem3gpp — The ModemManager 3GPP interface.
org.freedesktop.ModemManager1.Modem.Modem3gpp.Ussd — The ModemManager 3GPP USSD interface.
org.freedesktop.ModemManager1.Modem.ModemCdma — The ModemManager CDMA interface.
org.freedesktop.ModemManager1.Modem.Messaging — The ModemManager Messaging interface.
org.freedesktop.ModemManager1.Modem.Location — The ModemManager Location interface.
org.freedesktop.ModemManager1.Modem.Time — The ModemManager Time interface.
org.freedesktop.ModemManager1.Modem.Firmware — The ModemManager Firmware interface.

Modem objects are exported in DBus with the following path base: /org/freedesktop/ModemManager1/Modems/#, where # indicates a unique unsigned integer which identifies the object.

The Modem objects will export a generic Modem interface which includes common features and actions applicable to most modem types. This interface, among other actions, allows the management (creation, listing, deletion) of Bearer objects which can then be used to request the modem to get in connected state.

Modem objects will also export the generic Simple interface. This interface provides an easy access to the most simple and common operations that may be performed with the modem, including connection and disconnection. Users of the Simple interface do not need to take care of getting the modem registered, and they also don't need to manage the creation of bearers themselves. All the logic required to get the modem connected or disconnected is handled by the Simple interface.

Modems with specific 3GPP and/or CDMA capabilities will export modem type specific interfaces, like the 3GPP interface or the CDMA interface.