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:HFC宽带接入网和符合 DOCSIS规范的 Cable Modem 系统的实现促使 CATV运营商考虑利用 CATV网络来开展实时的分组话音业务 .在研究了有关技术规范的基础上 ,提出了 IP电话系统在 HFC上的实现方案 ,并着重讨论了基于 Cable Modem的 IP电话用户网关的软、硬件结构和功能实现
: The realization of HFC broadband access network and DOCSIS-compliant Cable Modem system has prompted CATV operators to consider using CATV network to carry out real-time packet voice service.On the basis of the relevant technical specifications, IP telephone system is proposed on HFC Implementation of the program, and focuses on the Cable Modem-based IP phone user gateway software and hardware structure and function