JPH04186993A - Key telephone system - Google Patents

Abstract

PURPOSE:To avoid a trouble of dial input of '0' by providing a 0 dial function to either a key telephone set or a master set and using the 0 dial function so as to make dialing to a public line connecting to a trunk line circuit of a private branch exchange from the key telephone set. CONSTITUTION:When a 0 dial function is active, at first a trunk line circuit 4a in a key telephone system 1 is acquired. Then 0 dial is sent automatically to a private branch exchange 2, which recognizes trunk line dialing. Then a subscriber number entered by a ten-key 3c is sent to the private branch exchange 2 to execute dialing to a desired public line. Moreover, the 0 dial function is not active when a trunk line button 3d is depressed or an extension button 3e is depressed before a subscriber number of a call destination by the operation of the ten-key 3c is entered. Thus, the dialing to the extension is attained similarly as the depression of the trunk line button 3d or the extension button 3e.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention provides a method for making calls to public lines using a private branch exchange (PBX).
The present invention relates to a key telephone device that is operated via a button telephone device.

[Prior Art] A button telephone device is a device that improves convenience when using several central office lines with multiple telephones, and consists of several button telephones, a main device that controls them, and a main device that controls them. It consists of multiple pairs of cables connecting the button telephone and the main device.

One form of usage of such a button telephone device is to install the button telephone device behind a private branch exchange, in other words, connect the central office line circuit of the main device to the extension circuit of the private branch exchange, and then connect the key telephone device to the public telephone. A system is known in which calls to a line are made via a private branch exchange.

In the conventional button telephone device in this type of usage, when making a call from the button telephone to the public line connected to the private branch exchange, first, as shown in Fig. 2, the button telephone equipped with In order to capture the central office line of the button telephone device by pressing the central office line button and lifting the handset (step 101), listen to the dial tone (DT) of the extension of the private branch exchange (step 1).
02). Next, dial "0" from the key telephone (step 103) to make the private branch exchange recognize the central office line call and capture the central office line circuit of the exchange (step 104). By dialing in the subscriber number (step 105), the call is made to the public line connected to the central office line of the private branch exchange.

[Problems to be Solved by the Invention] However, there is a problem in that the operation of dialing "0" from a key telephone to make a call to a public telephone line is cumbersome for the user of the key telephone.

Therefore, as a countermeasure to this problem, the button telephone device is equipped with a 0 number addition function that activates when the central office line button of the button telephone is pressed, and the dialing is performed after the central office line button is pressed. The O number addition function automatically adds "" to the beginning of the subscriber number of the called party.
It was proposed to add 0''.

However, if such a countermeasure is taken, it is true that when making a call from a key telephone to a public line via a private branch exchange, there is no need to dial "0", which improves operability. On the other hand, a new problem arises in that calls cannot be made to the extension of the private branch exchange.

Therefore, as a countermeasure to this new problem, it has been proposed to analyze numbers dialed from key telephones to determine whether the call is to an extension of a private branch exchange or a central office line of the private branch exchange.

However, according to this countermeasure, the numbers that can be used for extensions of the private branch exchange are restricted due to the number of the public line connected to the central office line of the private branch exchange, making it difficult to assign numbers to the extensions of the private branch exchange. This problem arises (e.g., NTT
(Nippon Telegraph and Telephone Corporation)'s weather forecast is 177, but this number cannot be assigned as a PBX extension).

The present invention has been made in view of the above-mentioned circumstances, and is a button telephone device in which a call to a public line is made via a private branch exchange (PBX). This eliminates the hassle of dialing in numbers, and does not sacrifice the ability to make calls to the extensions of the private branch exchange, nor does it limit the numbers that can be used for the extensions of the private branch exchange. An object of the present invention is to provide a button telephone device that is easy to handle and has no problems.

[Means for Solving the Problems] A button telephone device according to the present invention includes a main device whose central line circuit is connected to an extension circuit of a private branch exchange, and a button telephone connected to the main device, A call is made to a public line via the private branch exchange.

Either the key telephone or the main device includes:
Equipped with 0 transmission function.

This 0 dialing function is only available when the handset of the key telephone is off-hook, the central office line button or extension button on the key telephone is not pressed, and the subscriber number of the destination is subsequently dialed. The system automatically sends an "O" dial to the private branch exchange before transmitting the subscriber number dialed from the key telephone, so that the private branch exchange recognizes the call to the central office line, and then makes the call to the public line. Execute.

"Function" With the button telephone device according to the present invention, the newly equipped 0 dialing function eliminates the trouble of dialing "O" when making a call from the button telephone to the public line connected to the central office line circuit of the private branch exchange. can be resolved.

Moreover, the above-mentioned O call function does not operate if the office line button or extension button is pressed before the subscriber number is dialed. alike,
It becomes possible to make calls to the extension of the private branch exchange or the extension of the key telephone device.

Therefore, because of the above-mentioned O calling function, calls to the extensions of the private branch exchange are not sacrificed, and the numbers that can be used for the extensions of the private branch exchange are not restricted, making handling easier. It turned out to be excellent.

[Embodiment] Fig. 4 schematically shows a mobile phone using a button telephone device according to an embodiment of the present invention, and in the figure, reference numeral 1 is a button telephone device and 2 is a private branch exchange (PBX). .

The button telephone device 1 includes a plurality of button telephones 3, a main device 4 for controlling them, and multiple pairs of cables 5 connecting the main device 4 and the telephones 3.

The key telephone device 1 of this embodiment is installed behind the private branch exchange 2, and the office line circuit 4a in the main device 4 is connected to the extension circuit 2a of the private branch exchange 2.
The private branch exchange 2 is connected to the private branch exchange 2, and calls are made to the public line 6 connected to the central office line circuit 2b of the private branch exchange 2.

In FIG. 4, numeral 8 is an extension of the private branch exchange 2, and 9 is an extension telephone.

As shown in FIG. 3, the button telephone 3 includes a telephone main body 3a and a handset 3b, and on the telephone main body 3a is a numeric keypad 3C for dialing a subscriber number, etc. , the multiple central office line buttons 3-d to be pressed when making a call to the central office line, the extension button 3e for making a call to the extension of the main device 4 mentioned above, and the status of incoming and outgoing calls by blinking lamps, etc. A display section 3f for visual display is provided.

In the case of the button telephone device 1 of this embodiment, the call originating state from the button telephone 3 is identified, the handset 3b of the button telephone 3 is off-hook, and the central office line button 3d and extension button 3e of the button telephone are turned off. The callee's subscriber number appears on the numeric keypad 3C without being pressed or pressed.
If dialed by , the 0 dialing function is activated.

FIG. 1 shows the flow of processing when the 0 transmission function is activated.

That is, when the O dialing function is activated (step 201), it first captures the central office line circuit 4a in the button telephone device 1 (step 202), and then automatically sends the O" dial to the private branch exchange 2 and sends the O" dial to the private branch exchange 2. recognizes the central office line call (step 203), and then sends the subscriber number entered using the numeric keypad 30 to the private branch exchange 2 (step 2).
04), execute a call to the desired public line.

Note that the above-mentioned O calling function may be provided in either the key telephone 3 or the main device 4.

In addition, the above-mentioned 0 call function is activated when the central office line button 3d is pressed or the extension button 3e is pressed before the subscriber number of the destination is input by operating the numeric keypad 3C of the button telephone 3. In some cases, it does not work.

In the case of this embodiment, pressing the central office line button 3d and extension button 3e is valid both before and after the handset 3b is off-hook; is invalid, or invalid when buttons 3d and 3e are pressed after going off-hook.% Formula % Then, when the central line button 3d is pressed, "0" is entered using the numeric keypad 3C as before. Unless the information is entered manually, the private branch exchange 2 cannot be made to recognize the central office line call. Therefore, as in the past, by pressing the central office line button 3d and then inputting the subscriber number using the numeric keypad 3C, a call can be made to the extension of the private branch exchange 2.

In addition, if you press the extension button 3e and then input the subscriber number using the numeric keypad 3C, the button telephone device l
You will be able to make internal calls.

As described above, in the button telephone device 1 of the embodiment,
With the newly equipped 0 calling function, the public line 6 connected from the key telephone 3 to the central office line circuit 2b of the private branch exchange 2
This eliminates the trouble of dialing in "0" when making a call to a telephone number.

Moreover, the O calling function is performed in the button telephone 3.
Before dialing the subscriber number, press central office line button 3.
d or the extension button 3e is pressed, and by pressing the central office line button 3d or the extension button 3e, a call can be made to the extension of the private branch exchange 2 or the extension of the key telephone device 1, as in the past. Become.

Therefore, since the above-mentioned O calling function is installed, calling to the extension of the private branch exchange 2 is not sacrificed, and
There are no restrictions on the numbers that can be used for extensions of private branch exchanges, making it easy to use.

[Effects of the Invention] As is clear from the above description, the button telephone device according to the present invention uses the newly equipped O calling function to make a call from the button telephone to the public line connected to the central office line circuit of the private branch exchange. This eliminates the trouble of inputting "0" by dial in case of an error.

Moreover, the above-mentioned O dialing function does not operate if the office line button or extension button is pressed before the subscriber number is dialed on the key telephone; alike,
It becomes possible to make calls to the extension of the private branch exchange or the extension of the key telephone device.

Therefore, since the above-mentioned O calling function is installed, calls to the extensions of the private branch exchange will not be sacrificed, and the numbers that can be used for the extensions of the private branch exchange will not be restricted. It became an excellent one.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing the processing of the O call function according to an embodiment of the present invention, FIG. 2 is a flowchart when a call is made from a conventional key telephone device to a public telephone line, and FIG. , FIG. 4 is an explanatory diagram of the usage form of one embodiment. 1...Button telephone device, 2...Private branch exchange, 2a...Extension circuit, 2b...Station line circuit, 3...Button telephone , 3a...
Telephone body, 3b...Handset, 3c...
...Numeric keypad, 3d...Central line button, 3e...
...Extension button, 4...Main device, 4a...
...Public line circuit, 6...Public line, 8...
...Private branch exchange extension, 9...Extension telephone. Figure 1: Flowchart when making a call to a conventional public line Figure 2:

Claims (1)

[Claims] A central office line circuit includes a main device connected to an extension circuit of a private branch exchange, and a key telephone connected to the main device, and makes calls to a public line via the private branch exchange. A button telephone device, wherein either the button telephone or the main device includes:
Equipped with a 0 calling function, the 0 calling function is performed when the handset of the key telephone is off-hook, the central office line button or extension button of the key telephone is not pressed, and the subscriber number of the called party is subsequently dialed. It operates only when input is made, and automatically sends a "0" dial to the private branch exchange before sending the dialed subscriber number from the key telephone to recognize the central office line call. A button telephone device characterized in that the button telephone device is configured to make a call to a public telephone line.