Technique for estimation of a subscriber line insertion loss

Details Technique for estimation of a subscriber line insertion loss Technique for estimation of a subscriber line insertion loss

2005-05-17

2005-05-17

Nguyen, Vincent Q. (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

C324S538000, C324S066000, C379S399010

Reexamination Certificate

active

06894504

ABSTRACT:
A method and apparatus for pre-qualifying lines with respect to estimating the insertion loss of the line is presented. End-to-end insertion loss at high frequencies is estimated from measurements made at low frequencies through the voice switch at the central office of a telephone company. An AC voltage waveform is applied to the telephone line being tested. Real and imaginary components of the resultant waveform are measured. These measurements are captured and used to estimate the insertion loss of the telephone line at frequencies in the range of 40 kHz to 300 kHz.

REFERENCES:
patent: 6115466 (2000-09-01), Bella
patent: 6177801 (2001-01-01), Chong

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