Research for Long-Range Superv

为了克服光纤传输方式的缺点和采用视频电缆传输方式的不足，解决在野外条件下实
现安全、高速通讯这个难题，本文建议引入基于普通双绞线的宽带通信技术——xDSL 技术。文章在介绍了xDSL 技术群的特点及其基本原理的基础上，结合正在研发的远程视频监控系统和移动通讯系统的实际情况，提出了已经初步研发成功的基于ADSL 和HDSL 技术的系统级应用模型。
关键词：远程传输;xDSL;视频监控;ADSL;HDSL

Abstract: Based on an overall analysis of special conditions. The present thesis gives a
comparative study of the two principle long-range communication methods as well as points out the weakness involved in transmitting information by means of fiber or video cable. In order to achieve a safe and speedy communication, the paper suggests the adoption of the technology based on ordinary twisted-pair xDSL into the mine communication. At first, the paper briefs on the characteristics and basic principles of xDSL technology. Then, it puts forward the systematic application model.
Keywords: The long-range transmission; xDSL; The video supervision; ADSL; HDSL