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详细讨论离散多音频技术的原理，以及在动态分配子信道比特数时能达到的信道容量；用离散傅里叶变换实现ＤＭＴ，简化了其实现的复杂性；高比特率数字用户线技术利用现存的双绞铜线对传输高数据率的多媒体信息，提出了一种用ＤＭＴ技术实现ＨＤＳＬ的方案，并论证了与单载波系统相比能获得较高的传输数据率．
The principle of discrete multi-audio technology and the channel capacity that can be achieved when dynamically allocating the number of subchannels are discussed in detail. The DMT is implemented by discrete Fourier transform, which simplifies the implementation complexity. The high bit rate digital subscriber line technology uses the existing Twisted pair copper wire to transmit multimedia data of high data rate, a scheme of realizing HDSL with DMT technology is proposed, and a higher transmission data rate can be obtained compared with a single carrier system.