Patent ID: 6998853
Filing Date: 2006-02-14
Classification: H04L

Abstract:
1. A LAN cabling testing system, comprising: first and second patch cords each terminating at first and second plugs; a hand-held display unit and a hand-held remote unit, each one of said units including means for sending and receiving a wave form of selected frequency to and from the other of said units through said patch cords and a LAN link to be tested; the hand-held display unit including a jack for receiving a plug of one of the patch cords, said jack and plug defining a first mated connector pair; the hand-held remote unit including a jack for receiving a plug of the other of the patch cords, said jack and plug defining a second mated connector pair; phase measuring means for measuring phase in one of the display or remote units and for setting a reference plane at one end of the patch cord; means for measuring the input impedance looking into the patch cord at said reference plane; means for measuring the separation Δf between maxima of a plot of the input impedance versus frequency; and means for calculating the patch cord length according to the relation L