Due to its unique advantages in high transmission rate , independence of the phone lines as well as the wide coverage and cost - effectiveness of the catv network , cablemodem has become a very competitive broadband access technology 由于其具有很高的传输速率，不占用电话线路；并且它所需要的catv网的覆盖面积广、费用低廉，因此已成为一种极具竞争力的宽带接入技术。
The optimization of poan contains two problems : one is how to assign the optical branching devices ( obds ) to optical network units ( onus ) , and the other is how to determine the locationas of these obds 本文从当前存在的多种宽带接入方式谈起，提出了“宽带接入技术到底走向何方”的问题，然后得到毋庸置疑的结论：发展光纤接入技术是解决接入网宽带化的最根本和行之有效的办法。
Generally speaking , adsl is a promising broadband access technology . however , while providing adsl services , telcos should take account of all factors deciding the transmission performance of adsl , including subscribers lead - in wire and office wire Adsl是一种很有希望的宽带接入技术，但是在提供adsl业务时，应注意包括用户引入线和局内线等在内的各种影响adsl传输性能的因素。
Alcatel has made available a passive optical network equipment . designed as a broadband access technology or overlapped network for newly built residential zones , such equipment will be used as supplement to dsl and digital loop carrier technology Alcatel推出一种无源光网络设备，定位于作新建住宅小区的一种宽带接入技术或作为一种重叠网络，作为对dsl和数字环路载波技术的补充。
Hfc , one of the bandwidth access technologies , is a promising hi - tech boasting of economization , wide band and extensive coverage , and is generally acknowledged an ideal alternative solution when ftth ( the fiber to the home ) remains unavailable 光纤同轴混合网( hfc )具有经济、带宽高、覆盖范围广的优点，是一种发展前景广阔的宽带接入技术。但要在hfc上提供综合宽带业务，还需要较完善的网络管理。
At first , this paper introduces the development of homenetworking both in china and overseas . the technologies of broadband access and interconnection are studied . information appliance and residential gateway are analyzed 论文首先介绍了家庭网络在国内外的发展状况，对宽带接入技术、内部互联技术进行了研究，并分析了信息家电以及家庭网关，提出了以家居服务器为核心采用多种组网技术的家庭网络结构。
Nowadays , academic communities and industry from all over the world are increasingly showing great concern about a new broadband residential ip - based access technique , i . e . ethernet technique in the subscriber access network or the broadband residential ethernet - based access network 特别是，众多研究人员、网络设备制造商和标准化组织开始关注一种新的宽带ip接入技术，也就是基于以太网的宽带接入技术。
Owing to its fast development and innate broadband nature , digital tv systems , especially catv / hfc networks , are competitive candidates for broadband access networks , which meet the bandwidth requirements of convergence of video , voice and internet data services 我国的有线电视网( catv )拥有巨大的网络资源，是目前唯一的宽带入户网络，由有线电视网发展而来的混合光纤同轴电缆( hfc )网络更是一种理想的宽带接入技术。
Finally , this chapter summarizes the disadvantages of home networking using power line communication technique . chapter five , presenting advantages and disadvantages of some broadband access technologies , reviews the current status and development of plc technique 第五章介绍了基于电力线通信的一种新型宽带高速接入技术，分析了各种宽带接入技术的优缺点，对电力线通信在国内外的现状进行了描述，对其发展前景进行了展望。
Firstly , the discrete multi - tone processing in an adsl central office - side interface card is detailedly introduced . the processing mainly includes timing , framing , interleaving , forward error correction , cyclic redundancy check , constellation encoding , inverse fast fourier transform processing , prefixing , d / a converting , and amplifying . secondly , a kind of interface named utopia level 2 is used as the network interface , with which many adsl devices are linked with one atm layer 本文比较详细地阐述了数字用户线接入模块( dslam )开发方案中， adsl局端接口模块的dmt编码与调制过程，讨论了其组网应用方式以及基于atm的网络侧接口utopia2技术，分析了adsl与其它宽带接入技术的相互联系和优缺点，并介绍了方案中所采用的一些关键技术，包括在线插拔技术、系统同步启动和故障自动重起技术以及高速数字信号完整性的保证技术等等。
