The "HwAddress" property

HwAddress  readable   s

The "Carrier" property

Carrier  readable   b

Indicates whether the physical carrier is found (e.g. whether a cable is plugged in or not).

DEPRECATED: check for the "carrier" flag in the "InterfaceFlags" property on the "org.freedesktop.NetworkManager.Device" interface.

The "Slaves" property

Slaves  readable   ao

DEPRECATED. Use the "Ports" property in "org.freedesktop.NetworkManager.Device" instead which exists since version NetworkManager 1.34.0.