為了克服光纖傳輸方式的缺點和采用視頻電纜傳輸方式的不足，解決在野外條件下實
現安全、高速通訊這個難題，本文建議引入基于普通雙絞線的寬帶通信技術——xDSL 技術。文章在介紹了xDSL 技術群的特點及其基本原理的基礎上，結合正在研發的遠程視頻監控系統和移動通訊系統的實際情況，提出了已經初步研發成功的基于ADSL 和HDSL 技術的系統級應用模型。
關鍵詞：遠程傳輸;xDSL;視頻監控;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