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

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