Title:
XDLS SYSTEM WITH IMPROVED IMPEDANCE CIRCUITRY
Document Type and Number:
WIPO Patent Application WO2005022743
Kind Code:
A3
Abstract:
An XDSL system comprising a hybrid circuit in operative communication with a transmission line and an XDSL modem associated with a subscriber premises. The hybrid circuit comprises a plurality of selectable impedance circuits having different impedance values. A controller selectively engages each of the impedance circuits in-line with the XDSL modem and the transmission line. The controller records the performance of the modem with each circuit engaged, and selects the desired impedance circuit as a function of the performance characteristics associated with each of the impedance circuits. The impedance circuit which provides the best performance characteristic is selected as the impedance circuit for normal modem operation.
Inventors:
GOUGH GREGORY W (US)
BELLA GREGORY L (US)
BELLA GREGORY L (US)
Application Number:
PCT/US2004/027559
Publication Date:
December 21, 2006
Filing Date:
August 25, 2004
Export Citation:
Assignee:
WESTELL TECHNOLOGIES INC (US)
SBC LAB INC (US)
GOUGH GREGORY W (US)
BELLA GREGORY L (US)
SBC LAB INC (US)
GOUGH GREGORY W (US)
BELLA GREGORY L (US)
International Classes:
H04B1/38; H03H11/30; H04L27/00; H04M7/04; H04M9/00; H04M11/06; H04B1/58; H03H
Foreign References:
| US6542604B1 | 2003-04-01 | |||
| US4096361A | 1978-06-20 | |||
| US6724890B1 | 2004-04-20 | |||
| US4096362A | 1978-06-20 |
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