ADSL is a distance sensitive technology.As the connection length increase, the bandwidth is limited.The purpose of this paper is to analysis and compare phenomenon by experiment and simulation.

• 本研究将藉由实验与查测模拟的结果，进行性能分析比较，以确知在双绞线铜缆中，因线路距离变长，将使线路衰减变大而导致传输频宽受限。