Improper connection determination method and communication apparatus
AssigneeBrother Kogyo Kabushiki Kaisha
InventorsJyunji Maeda, Hiroshi Ono
Life of this patent
Estimating the term…
Abstract
An improper connection determination method includes a closed circuit forming step, a current detection step and a determination step. In the closed circuit forming step, a closed circuit from one of at least two contacts in a telephone connection terminal of a communication apparatus to another one of the at least two contacts in the telephone connection terminal is formed. In the current detection step, a current flowing in the closed circuit, when the closed circuit is formed in the closed circuit forming step, is detected. In the determination step, it is determined that the telephone line is improperly connected to the telephone connection terminal when the current is detected in the current detection step.
Claims10
An improper connection determination method for determining improper connection of a telephone line to a communication apparatus including a line connection terminal having at least two contacts to which the telephone line is connected, and a telephone connection terminal having at least two contacts to which a telephone set is connected, the method comprising:
- a closed circuit forming step of forming a closed circuit from one of the at least two contacts in the telephone connection terminal to another one of the at least two contacts in the telephone connection terminal;
- a current detection step of detecting a current flowing in the closed circuit when the closed circuit is formed in the closed circuit forming step;
- and
- a determination step of determining that the telephone line is improperly connected to the telephone connection terminal when the current is detected in the current detection step.
A communication apparatus comprising:
- a line connection terminal having at least two contacts to which a telephone line is connected;
- a telephone connection terminal having at least two contacts to which a telephone set is connected;
- a connection path connecting/disconnecting unit that is provided in a connection path for connecting the line connection terminal and the telephone connection terminal, and selectively connects and disconnects the connection path;
- an off-hook detection unit that is provided in a current path between the telephone connection terminal and the connection path connecting/disconnecting unit, and detects a current flowing through the current path;
- a closed circuit opening/closing unit that is provided in a closed circuit from one of the at least two contacts in the telephone connection terminal to another one of the at least two contacts in the telephone connection terminal through the off-hook detection unit, and selectively opens and closes the closed circuit;
- a control unit that performs a control to cause the connection path connecting/disconnecting unit to disconnect the connection path as well as to cause the closed circuit opening/closing unit to close the closed circuit;
- and
- a determination unit that determines, if the off-hook detection unit detects the current when the control unit performs the control, that the telephone line is improperly connected to the telephone connection terminal.
Dependencies are inferred from the claim text.