This International Standard covers the open systems interconnection (OSI) Layer 1 physical layer (PHY) air interface for a communications medium operating in the 60 GHz millimetric frequency range by providing the parameters for medium range, medium to high speed wireless communications in the ITS sector. It specifies the parameters required to interface the Layer 1 of such a system to the communications access for land mobiles (CALM) architecture. Application-specific requirements are not included in this International Standard. These requirements are defined in the CALM management and upper layer standards, including the CALM application management ISO 24102.