On the basis of above-mentioned analysis of channel peculiarity, the realistic channel capacity of present twisted subscriber line is calculated and the possibility that it is expanded and the ultra-limitation of capacity of HDSL are discussed.

• 在以上信道特性分析的基础上，计算了现有双绞用户线的理论信道容量，探讨其扩容的可能性和HDSL技术的容量上限。