Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of data transmission
Reexamination Certificate
2008-07-29
2008-07-29
Tieu, Binh K (Department: 2614)
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Of data transmission
C379S001030, C379S022020, C379S027080, C375S243000, C375S245000, C375S260000, C375S316000
Reexamination Certificate
active
07406157
ABSTRACT:
Embodiments of the invention provide methods for determining the characteristics of a local loop using the multi-carrier tones of a DSL activation process. For one embodiment, one or more sets of downstream multi-carrier tones of a digital subscriber line activation process are received at an extended voice-band modem and are capable of transmitting upstream multi-carrier tones of the digital subscriber line activation process over a local loop. The downstream carrier tones and the upstream carrier tones are folded into a first multi-tone signal and a second multi-tone signal, respectively, each having a plurality of component signals within the spectrum band of the extended voice-based modem. The total signal power of the first multi-tone signal is divided by the power of one of the plurality of component signals of the second multi-tone signal to determine a ratio value. The ratio value is used to determine a characteristic of the local loop.
REFERENCES:
patent: 6466629 (2002-10-01), Isaksson et al.
patent: 6898210 (2005-05-01), Cheng et al.
patent: 7310522 (2007-12-01), Geile
patent: 2005/0047513 (2005-03-01), Vitenberg
Krishnan Mandayam
Krishnan Vedavalli G.
Qiu Sigang
Smith Wesley H.
Tawade Prashant Pratap
Blakely , Sokoloff, Taylor & Zafman LLP
Intel Corporation
Tieu Binh K
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