| US 7,478,015 B2 | ||
| System for measuring the effect of an ADSL splitter | ||
| Huibert Steven Van Leerdam, Amersfoort (Netherlands) | ||
| Assigned to Koninklijke KPN N.V., The Hague (Netherlands) | ||
| Filed on Dec. 15, 2003, as Appl. No. 10/736,361. | ||
| Claims priority of provisional application 60/436736, filed on Dec. 27, 2002. | ||
| Prior Publication US 2004/0190710 A1, Sep. 30, 2004 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G06F 11/30 (2006.01) | ||
| U.S. Cl. 702—186 | 7 Claims |
| 1. 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.
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