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HDSL是一种可以在普通双绞线对上对称传送2Mbps高速数据的传输技术。其传输线分为1对,2对,3对或4对线,其中2,3线对是最常用的情况。HDSL采用了先进的数字信号自适应均衡技术和回波抵消技术消除传输线路中的近端串音、脉冲噪声和波形噪声以及线路阻抗不匹配而产生的回波对信号的干扰,从而能够在现有的普通双绞线上全双工地传输2Mbps的数字信号。无中继传输距离可达3—5公里。
HDSL is a transmission technology that can transmit 2 Mbps high-speed data symmetrically on an ordinary twisted pair. The transmission line is divided into 1 pairs, 2 pairs, 3 pairs or 4 pairs of lines, of which 2,3 pairs is the most common situation. HDSL uses advanced digital signal adaptive equalization technology and echo cancellation technology to eliminate transmission line near-end crosstalk, impulse noise and waveform noise and line impedance does not match the echo generated by the interference of the signal, which can now Some ordinary twisted pair full duplex transmission 2Mbps digital signal. No relay transmission distance up to 3-5 km.