Patent ID: 7478015

Claim:
Method for measuring an effect of at least one Asymmetrical Digital Subscriber Line splitter on at least one transmission characteristic of a system comprising an Integrated Service Digital Network infrastructure, the system further comprising a first Asymmetrical Digital Subscriber Line splitter connected to a local loop, the local loop connected to a second Asymmetrical Digital Subscriber Line splitter, and the second Asymmetrical Digital Subscriber Line splitter connected to an impedance, the method comprising the steps of: connecting an impedance meter to the first or second Asymmetrical Digital Subscriber Line splitter; measuring the at least one transmission characteristic comprising an impedance using the impedance meter; comparing the measured transmission characteristic with an internationally-defined range comprising a mask; identifying a transmission problem caused by the Asymmetrical Digital Subscriber Line splitter if the phase of the impedance falls outside the mask for some frequencies.