JPH0556471A - Key telephone system - Google Patents

Abstract

PURPOSE:To reduce the power consumption by stopping power supply to the key telephone system for a non-operating time zone to be set and restarting power supply when the use of the key telephone system is detected for an idle time zone. CONSTITUTION:A control section 11 turns off a transistor(TR) 3 for an idle time zone based on a set electron of the idle time zone stored in a storage section 12 to stop power supply from terminals t3, t4. Thus, power supply from a data power line to a telephone set control circuit 22 is interrupted. On the other hand, when call is implemented by the key telephone system for an idle time zone, a hook switch 23 is closed and a photocoupler PCa is lighted by a call current. The control section 11 receives the output of a PCb receiving the lighting to control the TR 3 to be turned on thereby restarting power supply from the terminals t3, t4. Thus, the power consumption is saved and the call is implemented urgently even in the idle time zone.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key telephone device,
In particular, the present invention relates to a power-saving button telephone device that eliminates wasteful power consumption during unused periods.

[0002]

2. Description of the Related Art A conventional example will be described with reference to FIG. In the figure, the key telephone 20 is provided with a call circuit 21, a telephone control circuit 22 and a hook switch 23.
The main device 30 is provided with a call current supply circuit (not shown), and a direct current is supplied from this circuit to the call line via the terminals t1 and t2 and the transistors Tr1 and Tr2. The coil L1 of the transformer T1 is connected to a communication path switch (not shown). On the other hand, a power supply (not shown) for supplying power to the key telephone 20 is connected to the terminals t3 and t6 of the data / power line.

With the above structure, the telephone control circuit 22 is operated by the power supplied from the power supply of the main unit 30 through the data / power line. The control of the key telephone 20 by the telephone control circuit 22 is performed based on transmission / reception control data with the data transmission circuit 13.

[0004]

By the way, in the conventional button telephone apparatus, power is constantly supplied from the main unit to each button telephone through the data / power line. Therefore, the electric power for the number of button telephones connected to the main device is wastefully consumed even during a non-usual time period, for example, at night or on holidays.

The present invention has been made in view of such a point, and during normal use, the power supply to the key telephone is stopped except during an emergency, which is wasteful when not in use. It is an object of the present invention to provide a power-saving button telephone device that consumes no power.

[0006]

A button telephone apparatus according to the present invention for achieving the above object is a button telephone apparatus composed of a main unit and a button telephone, which supplies or supplies electric power to the button telephone. Switch means for stopping, detection means for detecting ON / OFF of the hook switch of the key telephone, storage means for storing setting data for setting an unused time zone, the switch means,
The main unit is provided with a control unit for comprehensively controlling the detection means, the storage means, etc., and the power supply to the button telephone is stopped during the unused time period of the button telephone, and the button telephone of the unused period is operated. It is characterized by being a power-saving type in which power supply to the key telephone is restarted at the time of use according to the detection information by the detection means.

[0007]

[Function] The unused time period is investigated in advance for each key telephone and the survey data is stored in the storage unit. The control unit controls the switch means based on the data stored in the storage unit, and stops the power supply circuit to the key telephone during the unused time period. When a call is made on this key telephone during the unused time zone, the detection means detects that the hook switch of the key telephone has been turned on,
The control unit controls the switch means based on the detection data of the detection means, and restarts the power supply to the key telephone.
Further, even during the normal use time, by storing the timer data for a fixed time in the storage unit, the control unit controls the switch means when the key telephone is not used for the fixed time. The power supply can be stopped again by.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic block diagram of a key telephone device according to an embodiment of the present invention. The same reference numerals as those in FIG. 2 indicate the same elements, and a description thereof will be omitted. In the figure, a transistor Tr3 provided in the main unit 10 is a switch unit that controls the base potential to supply or stop the power supply from the terminals t3 and t4 to the telephone control circuit 22.

PCa is the light emitting side of the photocoupler, and emits light when the hook switch 23 of the key telephone 20 is turned on and a direct current flows through the telephone line. PCb is the light receiving side of the photocoupler and is paired with PCa. This PC
The photocoupler composed of a and PCb serves as a detecting means for detecting ON / OFF of the hook switch 23 of the key telephone 20. The storage unit 12 is a storage unit that stores setting data for setting unused time zones such as nighttime and holidays when the key telephone is not used. 11 is these transistors Tr3
And a photocoupler PCa, PCb are comprehensively controlled based on the setting data stored in the storage unit 12.

Next, the operation will be described. Storage unit 12
In the unused time zone, the control unit 11 turns off the transistor Tr3 based on the setting data for setting the unused time zone stored in, and stops the power supply from the terminals t3 and t4. Therefore, the power supply from the data / power line to the telephone control circuit 22 is cut off. On the other hand, when a telephone call is made with this key telephone in the unused time zone, the hook switch 23 is turned on, a call current flows through the call line, and the light emitting side PCa of the photocoupler emits light. Control unit 11
Receives the output of the light-receiving side PCb of the photocoupler that receives this light, controls the transistor Tr3 to the ON state, and the terminal t
3 and the power supply from the terminal t4 are restarted. Therefore, a call can be made in an emergency even in the unused time zone.

Further, if timer data for a fixed time is stored in the storage unit 12, the control unit 11 sets the transistor Tr3 based on the setting data in the storage unit 12 when the key telephone 20 is not used for the fixed time. The power supply to the key telephone control circuit 22 can be controlled to stop. As described above, the number of key telephones 20 is as large as tens and the unused time period is longer, which is very useful for saving unnecessary power consumption.

[0012]

As described above, according to the present invention, in the key telephone device composed of the main unit and the key telephone, the switch means for supplying or stopping the power supply to the key telephone, and the key telephone. Means for detecting ON / OFF of the hook switch, storage means for storing setting data for setting an unused time zone, and control section for comprehensively controlling the switch means, the detection means, the storage means, etc. Is provided in the main device, power supply to the key telephone is stopped during the non-use time of the key telephone, and when the key telephone is used in the non-use time, the key telephone is connected to the key telephone by the detection information by the detecting means. Since the power supply of the key telephone is restarted, the time when the key telephone is not normally used is long and the key telephone connected to the main unit is The greater the number is large, it is possible to eliminate a large amount of wasteful power consumption. In addition, when it is not used for a certain period of time, the power is automatically turned off, and further useless power consumption can be eliminated. It should be noted that since it is possible to make a call even during a time period when the normal key telephone is not used, the usage as a key telephone does not decrease.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of a key telephone device according to an embodiment of the present invention.

FIG. 2 is a schematic block diagram of a key telephone device in a conventional example.

[Explanation of symbols]

 10 main device 11 control unit 12 storage unit 13 data transmission circuit 20 button telephone 21 talking circuit 22 telephone control circuit 23 hook switch 30 main device C1 to C5 capacitors L1 to L5 coil PCa photocoupler light emitting side PCb photocoupler light receiving side R1 to R5 resistance T1 Transformers Tr1 to Tr3 Transistors t1 to t6 terminals

Claims (1)

[Claims] 1. A key telephone device comprising a main unit and a key telephone, and a switch means for supplying or stopping power supply to the key telephone and detecting ON / OFF of a hook switch of the key telephone. The main unit is provided with a detection unit for controlling the storage unit, a storage unit for storing setting data for setting an unused time period, and a control unit for comprehensively controlling the switch unit, the detection unit, the storage unit, etc. A power-saving type in which power supply to the key telephone is stopped during non-use time, and when the key telephone is used in the non-use time, the power supply to the key telephone is restarted by the detection information by the detection means. Button telephone device characterized in that