论文部分内容阅读
据上海市有线网络有限公司透露,到今年底,全球最大的上海有线电视网经改造,建成的集电视、电话、电脑三个网络于一身的“信息内环线”,将铺设到本市首批30万户家庭,使现代信息技术提供的种种便利,能够迅速、便捷、廉价地“驶入”普通市民的生活。 “信息内环线”能给我们带来什么惊喜呢?利用带宽的优势享受快速的因特网接入、电子商务和远程教育,价廉质不低的IP电话,随心所欲的VOD视频点播…… 当然,有路还得有车才能潇洒出行。要用电脑上网得依靠Cable Modem,要用电视机上网要配机顶盒,VOD、E-BUSINESS还需要ICP的配套。 言归正传,这篇文章将从CATV的历史说起,再谈谈Cable Modem的原理及可应用的相关层面,希望读者对Cable Modem有一个较清晰的完整的概念。
According to Shanghai Cable Network Co., Ltd., by the end of this year, the world’s largest Shanghai cable television network has been transformed and built into the “information inner ring” that integrates the three networks of television, telephone and computer and will be built in the first batch in this city With 300,000 families, all the conveniences provided by modern information technology can be quickly, conveniently and cheaply “brought into” the lives of ordinary citizens. What’s the surprise of “Inner Ring of Information”? Take advantage of bandwidth to enjoy fast Internet access, e-commerce and distance education, inexpensive IP phone, VOD video on demand ...... Of course, Road cars have to be able to chic travel. To use the Internet to rely on Cable Modem, to use TV set-top boxes to go online, VOD, E-BUSINESS also need ICP support. Closer to home, this article will talk about the history of CATV, and then talk about the principle of Cable Modem and the relevant level can be applied, I hope readers have a more clear and complete concept of Cable Modem.