JPS62242492A - Key telephone system - Google Patents

Abstract

PURPOSE:To prevent a telephone set from being used without permission by turning the telephone set to an origination stopping state or an origination available state when push-button operation is made coincident with a previously registered identification number. CONSTITUTION:An identification number is registered in a memory 8 at every key telephone set by depressing push-button of the key telephone set 3. When the contents of push-button operation indicate dial origination stop, a central processing unit (CPU) 7 detects whether the contents coincide with the stored identification number or not, and in case of coincidence, controls a trunk circuit 2 through a data I/O interface 6 so that a dial signal is not sent from the telephone set 3 to a trunk line 1. Consequently, the telephone set 3 is turned to the dial origination stop state. In case of releasing dial origination stop, the CPU 7 sends a signal for sending a dial signal from the telephone set 3 to the trunk line 1 to the circuit 2 through the interface 6 at the detection of the coincidence with the identification number.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a key telephone device, and more particularly to a key telephone device that has a central processing unit built into its main unit and controls a telephone by a stored program method.

[Conventional technology]

A key telephone device is a function that accommodates 2 to 10-odd office lines for several to 10 telephones in the same subscriber's premises, and allows users to select and use the office line, and to make calls between telephones. A device that has the function of performing this function and other functions.

Conventionally, in this type of key telephone device, the dial number is 3.
Prevention is to assign a service class such as special grade, semi-special grade, grade, or in-vehicle to the telephone housed in the key telephone device.
Classes were divided into classes where dialing could be made freely and classes where there were restrictions, and by preventing unnecessary dialing, the wastage of call charges was prevented.

[Problem that the invention seeks to solve]

With the above-mentioned conventional key telephone device, even a user of a telephone that is restricted from dialing can use a telephone that is not restricted from dialing to make dialing without the user's permission. Since no measures have been taken to prevent such calls, there is a risk that dial calls may be made without the user's knowledge of the telephone, which is not subject to restrictions on dial calls, and call charges may increase.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a key telephone device that can set a telephone that is not subject to restrictions on dialing to a state where dialing cannot be made by operating a button.

[Means for solving problems]

The key telephone device of the present invention includes a plurality of key telephones and a main device having a built-in central processing unit and connected to the plurality of key telephones.
The main device includes a memory for storing a recitation number keyed in by a button operation on each button telephone corresponding to each button telephone, and a corresponding recitation stored in the memory following a specific button operation on each button telephone. and control means for stopping or permitting dialing from each button telephone to the central office line in response to a control signal from the central processing unit when a button operation corresponding to a number is performed.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

The figure is a block diagram showing one embodiment of the present invention. The key telephone device of this embodiment includes a plurality of key telephones a3 and a main device l to which these plural key telephones 3 are connected.
The main part is composed of O.

The main device IO is composed of a trunk circuit 2, a button telephone interface 4, a voice switch circuit 5, a data input/output interface 6, a central processing unit 7, a memory 8, and a program memory 9.

The trunk circuit 2 accommodates a plurality of office lines 1, detects incoming calls from the office line 1, and sends a dial signal to the office line l.

The button telephone ink face 4 accommodates a plurality of button telephones 3 and sends button information and hook switch information from the button telephones 3 to the central processing unit 7 via the data input/output interface 6.

Lamp information and the like are sent from the central processing unit 7 to the button telephone 3 via the data input/output interface 6 and the button telephone interface 4.

The voice signals from the button telephone 3 and the central office line l are combined in the voice switch circuit 5 via the trunk circuit 2 and the button telephone interface 4.

The central processing unit 7 controls the entire device according to instructions registered in the program memory 9.

The memory 8 is a memory circuit that can store data such as recitation numbers.

Next, the operation of the key telephone device of this embodiment configured as described above will be explained. When a button on the button telephone a3 is operated, the button information is sent to the central processing unit 7 via the button telephone ink face 4 and the data input/output interface 6. The central processing unit 7 analyzes the content of the button operation, and if the button operation is to store a recited number, the recited number is registered in the memory 8 corresponding to each key telephone.

If the content of the button operation is to stop dialing, the central processing bag T17 determines whether the recited number already stored in the memory 8 corresponding to the button telephone a3 on which the button operation was performed has been dialed consecutively. If they match, a control signal is sent to the trunk circuit 2 via the data input/output interface 6 to prevent the button telephone 3 whose button was operated from transmitting any dial signal to the central office line 1. . As a result, the button telephone a3 whose button has been operated enters a dialing halt state in which no dialing signal is sent from the trunk circuit 2 to the office line 1 even if a dialing operation is performed.

If the button operation is to cancel the dialing stop,
The central processing unit 7 operates the button telephone 3 on which the button operation is performed.
In response to this, it is determined whether the recited number already stored in the memory 8 has been dialed consecutively, and if they match, a button operation is performed on the trunk circuit 2 via the data input/output interface 6. A control signal is sent out to enable the button telephone 3 to send a dial signal to the office line l. As a result, the button telephone 3 on which the button has been operated enters a dialing permission state in which a dialing signal is sent from the trunk circuit 2 to the station IS 1 when a dialing operation is performed.

〔Effect of the invention〕

As explained above, in the present invention, a PIN number is registered in advance in correspondence with a key telephone by button operation, and when a button operation that matches the corresponding PIN number is performed on the button telephone, the telephone is placed in a dialing stop state. By making it possible to make dial calls or, conversely, make dial calls possible, it is possible to prevent anyone other than the user of the key telephone from making dial calls without permission, which has the effect of preventing increases in call charges due to unauthorized use. be.

[Brief explanation of drawings]

The figure is a block diagram showing one embodiment of the present invention. In the figure, 1... Office line, 2... Trunk circuit, 3... Button telephone, 4... Button telephone interface, 5... Voice switch circuit, 6... Data input/output interface, 7 ...Central processing unit, 8.Memory, 9.Program memory, IO..Main device.

Claims (1)

[Scope of Claims] A key telephone device comprising a plurality of button telephones and a main device having a built-in central processing unit and connected to the plurality of button telephones, wherein the main device is configured to control buttons on each button telephone. A memory for storing a PIN number keyed in by operation corresponding to each button telephone, and when a button operation corresponding to a corresponding PIN number stored in the memory is performed on each button telephone following a specific button operation. A key telephone device comprising: control means for stopping or permitting dialing from each button telephone to a central office line in response to a control signal from the central processing unit.