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1. (WO1999007129) FAULT LOCATION IN THE ACCESS NETWORK

Pub. No.:    WO/1999/007129    International Application No.:    PCT/GB1998/002251
Publication Date: Feb 11, 1999 International Filing Date: Jul 28, 1998
IPC: G01R 31/02
H04M 3/30
Applicants: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
CHASKELL, Andrew, David
Inventors: CHASKELL, Andrew, David
Title: FAULT LOCATION IN THE ACCESS NETWORK
Abstract:
This invention relates to the location of circuit to circuit faults in a telecommunications network. In conventional tests, measurements are carried out on only one pair. The measurements on a pair suffering from a circuit to circuit fault can determine that a fault exists, but such tests cannot give any indication as to the location of the fault within the access network. In this invention a test signal is generated on a particular circuit and all adjacent circuits are tested for the presence of the test signal. Using information from a routing database the likely location of a circuit to circuit may be determined.