数据广播区域性业务的规划

地市、县（市）的网络如果统一规划，可以通过总前端、分前端的方式，对数据广播增值业务进行分布式部署。通常在市网中心机房搭建一套数据广播系统总前端，播出全局性、全面性、通用性的内容，下属的各县分公司不再建设自己的分前端，而是通过网络适配器、复用器、调制器等设备，接收市网总前端的内容后，再通过各县（市）自己的HFC网络提供给网内用户，充分共享市网总前端的数据广播资源。同时，市网数据广播留有各县（市）专用页面，由各县市负责内容提供。

Plan of Datacasting Regional Service

If the network of city or county can be unified, we can distribute value-added services by the total front-end and front-end. We usually build up a datacasting system in center engine room to broadcast the overall, comprehensive and universal content. And a subsidiary of counties neednt to build their own sub-division. They can receive the contents of the total front-end through the network adapter, re-appliances, modulators and other equipment. Then they can transmit the contents to their users through their own HFC network. In this way, we can make full use of the datacasting network resources of the the city datacasting network remains the counties （cities） private page for total front-end. At the same time, their own contents.