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US 2017/0064074 A1Published application
Communication device
AssigneeOki Data Corporation
InventorKimiaki OGAWA
Life of this patent
Estimating the term…
Abstract
A communication device includes: a signal generator configured to generate a first signal and supply the first signal to a telephone line; a terminator having a variable terminal impedance as seen from the telephone line; a detector configured to detect a difference between the terminal impedance and a line impedance of the telephone line; and a controller configured to determine the terminal impedance so that the difference is reduced.
Claims17
A communication device comprising:
- a signal generator configured to generate a first signal and supply the first signal to a telephone line;
- a terminator having a variable terminal impedance as seen from the telephone line;
- a detector configured to detect a difference between the terminal impedance and a line impedance of the telephone line;
- and
- a controller configured to determine the terminal impedance so that the difference is reduced.
2 more elements
A communication device for communication via a telephone line, comprising:
- a terminator for terminating the telephone line, the terminator having a variable terminal impedance;
- a transmitter connected to the telephone line via the terminator and configured to transmit a first signal to the telephone line;
- a detector connected to the telephone line via the terminator and configured to receive a second signal caused by reflection of the first signal from the telephone line and detect a magnitude of the second signal;
- and
- a controller configured to adjust the terminal impedance on a basis of the detected magnitude.
2 more elements
Dependencies are inferred from the claim text.