physical unit in an ITS-S unit containing part or all of the functionality of an ITS-S

NOTE 1 to entry If an ITS-SU consists of a single physical unit, the ITS-SU and the ITS-SCU are identical. If an ITS-SU consists of more than one ITS-SCU, then these ITS-SCUs are interconnected via the ITS station-internal network of the ITS-SU.