US 12,407,773 B2
DSL fault location
Feiyu Fang, London (GB); Lykourgos Kekempanos, London (GB); and Daniel Gilks, London (GB)
Assigned to BRITISH TELECOMMUNICATIONS public limited company, London (GB)
Appl. No. 18/549,298
Filed by BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY, London (GB)
PCT Filed Mar. 7, 2022, PCT No. PCT/EP2022/055699
§ 371(c)(1), (2) Date Sep. 6, 2023,
PCT Pub. No. WO2022/189332, PCT Pub. Date Sep. 15, 2022.
Claims priority of application No. 2103204 (GB), filed on Mar. 8, 2021.
Prior Publication US 2024/0129404 A1, Apr. 18, 2024
Int. Cl. H04M 3/08 (2006.01); H04M 3/30 (2006.01)
CPC H04M 3/085 (2013.01) [H04M 3/306 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method of determining the location of a disconnection on a test digital subscriber line, wherein said test digital subscriber line comprises a plurality of nodes, said method comprising:
i) determining a measured loop length associated with each of the digital subscriber lines in a population of digital subscriber lines using line test measurements;
ii) determining an inventory loop length associated with each of the digital subscriber lines in the population of digital subscriber lines using inventory data;
iii) calculating a function that maps the measured loop lengths against the corresponding inventory loop lengths for each of the digital subscriber lines;
iv) determining a measured loop length associated with the test digital subscriber line using line test measurements;
v) mapping the measured loop length associated with the test digital subscriber to a predicted loop length using the calculated function;
vi) determining a position for each of the plurality of nodes on the test digital subscriber line using inventory data; and
vii) determining the location of a disconnect by comparing the predicted loop length to the position of each of the plurality of nodes.