JPH0455017B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a telephone set having a function of holding a telephone line.

BACKGROUND OF THE INVENTION In recent years, multi-function telephones that can store dialed numbers have become commonplace, and more and more have recently added a line hold function to these telephones. In such phones, memory retention,
The phone is equipped with a battery to memorize dialed numbers or as an auxiliary power source, but even when the line is on hold, power continues to be supplied from the battery to the phone's circuitry, which wastes the battery needlessly. The reality is that there are some inconveniences when using it.

Hereinafter, a conventional telephone having the above-mentioned hold function will be explained with reference to FIG.

FIG. 2 shows the configuration of a conventional telephone having a hold function. In FIG. 2, 1 and 2 are connection terminals to the telephone line, 3 is a line holding circuit means,
Reference numeral 4 denotes a communication circuit means; 5 a control circuit means for controlling the communication circuit means 4 and all operations as a telephone; 6 a battery and the like; It is a power supply means that supplies power.

The operation of a conventional telephone having a line holding function configured as described above will be explained.

As shown in FIG. 2, the operation of the communication circuit means 4 is controlled by the control circuit means 5, and when an ON input from the control circuit means 5 (for example, even if the switch is in the on-hook state, the line is forcibly connected). (Used in cases where the telephone is to be used) or by an off-hook operation of the handset, etc., the telephone communication circuit means 4 is turned on. The turned-on communication circuit means 4 forms a direct current loop with the telephone line and becomes ready for communication. At this time, power is supplied to the communication circuit means 4 and the control circuit means 5 by the power supply means 6.
Here, when the line holding means 3 is turned on, a DC loop with the telephone line is formed by the line holding means 3, and the line is put on hold.

Problems to be Solved by the Invention However, in the above configuration, unless the control circuit means 5 performs an off operation, the power supply means 6 supplies power to the communication circuit means 4, and the power supply means 5 This has the problem of unnecessary consumption of batteries and other components.

The present invention solves the above conventional problems and provides a telephone with a line hold function that eliminates unnecessary power consumption of the power supply means when the line is held.

Means for Solving the Problems In order to solve the above-mentioned problems, the telephone with a line holding function of the present invention includes a line holding means, a holding current detecting means, a control circuit means, a calling circuit means, and a telephone with a line holding function. It is constituted by a power supply means for supplying power to the circuit means and the control circuit means, and a switch means. The device is configured to cut off power supply to the device.

Effect With the above configuration, when the line goes from the call state to the hold state, the hold current is detected, the control circuit turns off the switch means, the power supply from the power supply means to the call circuit means is stopped, and unnecessary power is stopped. This means that the line can be placed on hold without consuming significant power.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIG.

FIG. 1 shows an example of the configuration of a telephone with a line hold function according to this embodiment.

In FIG. 1, 7 and 8 are terminals for connecting to a telephone line, 9 is a holding current detection means, 10 is a line holding circuit means, 11 is a telephone communication circuit means, 12 is a control means, 1
3 is an input terminal of the control means 12 to which the output terminal of the holding current detection means 9 is connected; 14 is a power supply means composed of a battery or the like and supplies power to the communication circuit means 11 and the control means 12; 15 is a control means; A switch means 16 having an input terminal and inserted between the communication circuit means 11 and the power supply means 14 is an output terminal of the control means 12 for controlling the switch means 15.

In the telephone with a line hold function configured as described above, the telephone circuit means 11 is turned on by an on input to the control means 12 or an off-hook operation of the handset (not shown), and the telephone circuit means 11 which is turned on is connected to the telephone line. A DC loop is formed and communication is possible. At this time, the switch means 15 is turned on by the output of the output terminal 16 of the control means 12,
Power is supplied to the communication circuit means 11 from the power supply means 14 . When the line hold circuit means 10 is turned on, a DC loop with the telephone line is formed by the line hold circuit means 10. This DC loop current during line hold is detected by the hold current detection means 9 and input to the input terminal 13 of the control means 12.
When the control means 12 receives the output of the holding current detection means 9, it generates an output from an output terminal 16 to turn off the switch means 15. This OFF output turns off the switch means 15, and the power supply from the power supply means 14 to the communication circuit means 11 is stopped. Further, in this embodiment, power is supplied to the control means 12 even in the line hold state, so that it can perform some operations.

Effects of the Invention As described above, according to the present invention, the control circuit turns off the switch means based on the detection output of the holding current detection circuit, and stops the power supply from the power supply means to the communication circuit means, so that the line It is possible to construct a telephone with a line hold function that stops the power supply from the power supply means when the line is on hold and eliminates unnecessary consumption of power, which has great effects.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a telephone with a line hold function showing an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional telephone with a line hold function. 7, 8...Telephone line connection terminal, 9...Hold current detection means, 10...Line hold circuit means, 11
...Telephone circuit means, 12...Control means, 14...
Power supply means, 15... switch means.

Claims (1)

[Claims] 1. A line holding circuit means and a talking circuit means inserted in parallel between connection terminals with a telephone line, a holding current detecting means for detecting a holding current flowing through the line holding circuit means, and a control for controlling the operation of the talking circuit means. a power supply means for supplying power to the control means and the communication circuit means; and a switch means operated by an output from the holding current detection means to cut off power supply from the power supply means to the communication circuit means. A telephone with a line hold function.