Recommendation ITU-T J.195.1 specifies the functional requirements of high performance network over Coax (HiNoC) for high-speed data transmission over coaxial networks in the cable industry. IP technology is one of the foreseeable trends of the next generation broadcasting network, which needs to fully support triple-play services and the rapidly increasing bandwidth demands for multi-channel video services. Therefore, it is necessary to define the functional requirements of HiNoC. This Recommendation contains descriptions of functional requirements for general system, physical layer and MAC layer functions over coaxial networks connected with fibre to the building. This Recommendation also provides a HiNoC operation-deployment scenario (see Appendix I) and HiNoC use cases (see Appendix II).