Impairments identification module and method
View Patent ↗A method to identify impairments in telecommunication lines i, j , k, . . . of a binder includes globally performing Single-Ended Line Testing SELT on the lines of the bundle. The method further includes applying an input signal in a first mode out of a multi-mode group including at least one differential mode for a respective line of the bundle and including at least one phantom mode for a respective pair of lines of the bundle. The method further includes measuring an echo signal E in a second mode out of the multi-mode group, the second mode being different of the first mode, and analyzing the echo signal in view of the input signal for deriving therefrom the searched impairments.
1. A method to identify impairments in telecommunication lines of a bundle, said method comprising:
performing Single-Ended Line Testing SELT on said lines of said bundle;
applying an input signal in a first mode out of a multi-mode group comprising at least one differential mode for a respective line of said bundle and comprising at least one phantom mode for a respective pair of lines of said bundle; and
measuring an echo signal in a second mode out of said multi-mode group being different of said first mode; and
analyzing said echo signal in view of said input signal for deriving therefrom impairments.
2. The method of claim 1 , further comprising:
repeating said measuring in a second mode and analyzing said echo signal for every mode of said multi-mode group being different of said first mode.
3. The method of claim 1 , wherein time domain reflectometry is used.
4. The method of claim 1 , wherein frequency domain reflectometry is used.
5. The method of claim 1 , wherein said telecommunication lines are DSL lines.
6. An impairments identification module configured to identify impairments of telecommunications lines of a bundle, wherein said impairments identification module comprises:
a multi-mode group of modules including, at least one differential mode module for a respective line of said bundle configured to apply an input signal in a differential mode and adapted to measure an echo signal in a differential mode; and
at least one phantom mode module for a respective pair of lines of said bundle configured to apply such input signal in a phantom mode and adapted to measure such echo signal in a phantom mode; and
control means for controlling, during execution of one cycle of Single-Ended Line Testing SELT on said lines of said bundle, application of said input signal to a first module of said modules of said multi-mode group of modules and for controlling measurement from a second module of said modules of said multi-mode group of modules, said second module being different from said first module; and
a processing unit configured to analyze said measured echo signal in view of said input signal for deriving therefrom impairments.
7. The impairments identification module according to claim 6 , wherein said impairments identification module is located in a telecommunication DSL Modem.
8. The impairments identification module according to claim 6 , wherein said impairments identification module is located in a telecommunication access node.
9. The impairments identification module according to claim 6 , wherein said processing unit being comprised in a server of the telecommunication network.
10. The impairments identification module according to claim 6 , wherein said processing unit is a dedicated measuring device.