Patent ID: 8081735
Filing Date: 2011-12-20
Classification: H04M

Abstract:
1. A method for determining if a node through which a signal to or from a source is transmitted is either one of a first node connected to a first transmission line or a second node connected to a second transmission line when the transmission periods through said first and second transmission lines to or from the source to from or to said respective nodes are known relative to one another, said steps including: A.) provide a means for measuring a reflected transmission period being the period from the start of an original signal from said source to the instant of reception at the source of an echo of the original signal reflected from a node; B.) connect the means of step A) between the source and one end of the transmission line opposite said node; C.) generate a test signal from the source permitting said test signal to be reflected from said node; D.) apply said means of step A to measure a reflected transmission period of said test signal; E.) compare said transmission period to said known transmission periods thereby leading to a conclusion as to which transmission line of first or second lines, said test signal was transmitted.