由于高速上网现在变得越来越重要,尤其对许多家庭和办公室来说,如何利用已经入户的线路来提供互联网高速接入已经成为非常切合实际和日益迫切的需求。众所周知,能够入户的线路,除了电话线和有线电视电缆以外,就数电力线了。而电力线是其中普及最广的线路,遍布家家户户,甚至一个楼里的每间房间都有电源捅座。可以说,高、中、低压输配电线路是目前覆盖面最为广大的网络基 As high-speed Internet access is becoming more and more important nowadays, it has become very practical and increasingly urgent for many homes and offices to utilize the existing home lines to provide high-speed Internet access. As we all know, to access the line, in addition to telephone lines and cable television cable, the number of power lines. The power line is one of the most widely used in the line, all households, or even a building in each room have poke seat. It can be said that high, medium and low voltage power transmission and distribution lines are the most extensive network coverage