JPS61256858A - Telephone set with line holding function - Google Patents

Abstract

PURPOSE:To prevent unnecessary power consumption when a line is held by making a switching means off with a control circuit by the detecting output of a holding current detection circuit and terminating a power supply to a call circuit means from a power supplying means. CONSTITUTION:With making a line holding circuit means 10 on, a DC loop with a telephone line is formed by the line holding means 10. DC loop current in a line holding time is detected by a holding current detecting means 9 and is inputted to the input terminal 13 of a control means 12. The control means 12 generates an output which makes a switching means 15 off from an output terminal 16 and the switching means 15 is made off and the supplying of power to a call circuit means 11 and the control means 12 from a power supplying means 14 is terminated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention 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 recently, many have added a line hold function to these telephones.

These telephones are equipped with a battery to maintain memory, remember dialed numbers, or as an auxiliary power source, but the battery continues to supply power to the telephone circuitry even when the line is on hold. Therefore, the actual situation is that the battery is consumed unnecessarily and there are also inconveniences in use.

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

FIG. 3 shows the configuration of a conventional telephone having a hold function. In FIG. 3, 1 and 2 are connection terminals to the telephone line, 3 is a line hold circuit means, 4 is a telephone call circuit means, and 5 is a telephone line connection terminal.
controls the communication circuit means 4.

control circuit means for controlling all operations as a telephone; 6
1 is a power supply means which is composed of a battery or the like and supplies power to the communication circuit means 4° and the control circuit means 5.

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

As shown in FIG.
The operation is controlled by the on-input from the control circuit means 5 (for example, used when the line is forcibly connected even if the hook switch is in the on-hook state).
Alternatively, the communication circuit means 4 is turned on by an off-hook operation of the telephone receiver. The turned-on communication circuit means 4 forms a direct current loop with the telephone line and becomes ready for communication. At this time, the communication circuit means 4. The control circuit means 5 is supplied with power 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-described configuration, unless the control circuit means 6 performs an off operation, the power supply means 6 is turned off by the communication circuit means 4. and the control circuit means 5, which has the problem of unnecessarily consuming batteries and the like that are components of the power supply means 6.

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, and the switch means is operated by the output of the holding current detection means, and the power supply means is connected to the communication circuit means from the power supply means to the communication circuit means. It is configured to cut off the power supply.

Effect When the above-described configuration changes from a single call state to a line 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 This means that the line can be put on hold without consuming power.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2.

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

In FIG. 1, reference numerals 7 and 8 denote connection terminals with a telephone line, 9 a holding current detection means, 10 a line holding circuit means, 11 a telephone communication circuit means, and 12 a control means.

Reference numeral 13 indicates an input terminal of the control means 12 to which the output terminal of the holding current detection means 9 is connected, and reference numeral 14 includes a battery or the like, and the communication circuit means 11. and a power supply means 15 for supplying power to the control means 12, having a control input terminal, and a power supply means 15 for supplying power to the control means 12, and a power supply means 15 having a control input terminal. and switch means inserted between the control means 12 and the power supply means 14; 16 is an output terminal of the control means 12 for controlling the switch means 15;

In the telephone with line hold function configured as above,
When the control means 12 is turned on or the handset (not shown) is operated off-hook, the five-stage telephone circuit 11 is turned on, and the telephone circuit means 11 that is turned on forms a DC loop with the telephone line and becomes ready for telephone communication. At this time, the switch means 16 is turned on by the output from the output terminal 16 of the control means 12, and the communication circuit means 11. Power is supplied to the control means 12 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.

The DC loop current when the line is held is determined by the holding current detection means 9.
and is 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 16. This off output causes the switch means 15 to
is turned off, and the power supply means 14 and the communication circuit means 11 are turned off.
．． And the supply of power to the control means 12 is stopped. or,
In the case of a type in which the control means 1.2 performs some operation even in the line hold state, the switch means 16 is installed only between the power supply means 14 and the communication circuit means 11 as shown in FIG. You can just insert it.

Effects of the Invention As described above, according to the present invention, when the line is on hold, the switch means is turned off by the control circuit based on the detection output of the hold current detection circuit, and the power supply from the power supply means to the communication circuit means is stopped. It is possible to construct a telephone with a line hold function that stops the power supply from the power supply means and eliminates unnecessary consumption of power, and the effect is remarkable.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a telephone with a line hold function showing one embodiment of the present invention, FIG. 2 is a block diagram of a telephone with a line hold function showing another embodiment of the invention, and FIG. 3 is a conventional one. FIG. 2 is a block configuration diagram of a telephone with a line hold function. 7.8...Telephone line connection terminal, 9...
... Holding current detection means, 10... Line holding circuit means, 11... Call circuit means, 12...
- Control means, 14... Power supply means, 16...
...Switch means. Name of agent: Patent attorney Toshio Nakao and one other person7.
8... Ih talk, 8 elephants' talent, childbirth terminal 2... 7 Magoru/wo Ike Koide J Maki 70... 1 skillful Nobu @ Hidehiko no 4... Electric Si Roshi, No L Shiba - #8 Kuku9ji15...
Switch 5 (

Claims (1)

[Claims] 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 means for controlling the operation of the talking circuit means. and a power supply means for supplying power to the control means and the communication circuit means, and a switch means operated by the output from the holding current detection means to cut off the power supply from the power supply means to the communication circuit means. A telephone with a line hold function.