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Automated loop identification on DSL lines
Author(s) -
Kerpez Kenneth J.
Publication year - 2009
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.1029
Subject(s) - digital subscriber line , loop (graph theory) , computer science , local loop , asymmetric digital subscriber line , identification (biology) , twisted pair , cable modem , channel (broadcasting) , telephone line , telecommunications , telephony , botany , mathematics , combinatorics , biology
Regular ADSL and new FTTN VDSL2 deployments are strongly affected by the telephone loop, or channel, that they transmit over. Telephone companies keep records of the loop make‐up—all cable sections, gauges, lengths and bridged taps between the DSLAM and customer, and these records are vital for loop qualification and maintenance. However, loop records are often incomplete or inaccurate due to re‐work. New ADSL2, ADSL2 + and VDSL2 equipment can automatically report loop response estimates, and this paper shows how this response can be used to identify an estimate of the loop make‐up. The algorithm for loop identification here is shown to be more accurate than previous, simple, techniques. Copyright © 2009 John Wiley & Sons, Ltd.