与传统方案相比，IBAS（综合宽带接入系统）所采用的两纤单向通道倒换环具有更好的优越性。

To compare with the traditional scheme, the two-fiber single direction channel rotating ring used in IBAS shows more superior.

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CMTS系统是HFC网络中的关键设备之一，它能够使有线电视用户实现宽带接入并享受交互式综合业务服务。

CMTS system is one of the key devices in HFC network, it can make CATV users access broad-band network and enjoy the interactive integrated service.

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