Double-ended line probing (DELP) for DSL systems

Details Double-ended line probing (DELP) for DSL systems Double-ended line probing (DELP) for DSL systems

2005-04-08

2009-11-24

Tieu, Binh K (Department: 2614)

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Testing of subscriber loop or terminal

C379S001040, C379S022070, C379S024000, C379S029050

Reexamination Certificate

active

07623630

ABSTRACT:
Double-ended line probing (DELP) techniques are described herein that enable a loop configuration to be identified based on mathematically simple error functions, which are both time-efficient and less sensitive to measurement errors. A DELP algorithm uses readily available data about the channel that is generated prior to the modem operation (e.g., theoretical loop models) and other available data (e.g., that provided by loop diagnostic modules) to estimate the loop configuration including the line length and gauge, as well as the number of bridge taps and their gauges, lengths, and locations.

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