| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for determining the imbalance resistance of a conductor by limiting the data service of the conductor because the upper limit of the maximum allowable resistance imbalance within data communication lines is established.SOLUTION: A method comprises a step of applying a signal from a control device to the ends of at least three electric wires of a conductor. In the control device, measurement resistance of one of the at least three conductive wires is used as a reference value, and the resistance difference between first and second electric wires of the conductor is determined. The conductor is permitted to give service when the resistance difference between the first and second electric wires is equal to or less than a threshold value. |
