This Recommendation defines the functional requirements of high performance network over coax (HiNoC) for high-speed data transmission over coaxial networks connected with fibre to the building (FTTB). The functionalities described in this Recommendation are based on FTTB + coax architecture. HiNoC provides more bandwidth with the unassigned spectrum of the last 100 m coaxial network. HiNoC also supports the operations of existing TV broadcasting services.