JPH0221719B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a button telephone device having a key telephone having fewer central office line keys than the number of central office lines connected to a main device and at least one extension key. This relates to a method for displaying station line status.

[Technical background of the invention and its problems]

6 or 4 connection wires between the main device and the key telephone
In a button telephone device with reduced wires, four or two wires are used for data transmission, and the remaining two wires are used for audio signal transmission.

In the case of conventional button telephone devices like this,
There is a one-to-one correspondence between the office line connected to the main device and the office line key provided on the key telephone. In the oldest type of key telephone device, if the key telephone did not have a central office line key corresponding to the central office line to be connected, it was difficult to connect to that central office line.

However, if the number of office lines connected to the main unit of such a key telephone device is increased, or if a system with a large number of office lines is constructed using a low-cost button telephone with a small number of office line keys from the beginning, However, there was a demand for connections to central office lines for which there was no corresponding central office line key on key telephones. That is, if the central line set on the key telephone by the main device does not match the central telephone key and its display, it is desirable to display that a central telephone call is in progress. Specifically, when it is necessary to transfer to key telephone B a call received by a certain key telephone A on a central office line that is not represented by the central office line key of another key telephone B (a call from the same party to a different person). (in the case of a telephone call), it is desirable that the key telephone set B displays an indication that the telephone line is in use.

In order to meet such demands, the following methods have conventionally been adopted.

A method that allows a button telephone to connect to a central office line for which a corresponding central office line key is not provided, by transfer. However, since the key telephone is not equipped with a corresponding central office line indicator,
No display will be made.

The button telephone is equipped with a representative office line key and its display, and when connected to a station line other than the office line corresponding to the office line key on the button telephone, all information is displayed on the display corresponding to the representative office line key. A method to make it happen.

However, in the former method, when a central office line key on the key telephone set is connected to a central office line other than the corresponding central office line, no display is given, which gives the user of the key telephone a sense of anxiety.

In addition, although the latter method can eliminate the user's anxiety as described above, it also requires a separate Providing a key is wasteful. Furthermore, the structure of key telephones is complicated, and despite this, the representative office line key and its display cannot perform the same function as other office line keys and their displays (for example, it is impossible to hold hold). ).

[Purpose of the invention]

The present invention has been made in view of the drawbacks of the conventional system, and its purpose is to change the connection state with a central office line other than the central office line corresponding to the central office line key on the button telephone without changing the configuration of the button telephone. An object of the present invention is to provide a station line status display system that can accurately notify the station line status.

[Summary of the invention]

Therefore, in the present invention, a key telephone having fewer office line keys and at least one extension key than the number of office lines connected to the main device is provided with a central office line other than the office line corresponding to the office line key possessed by the key telephone. When connecting, a message to that effect is displayed on the display corresponding to the extension key.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a key telephone device to which the present invention is applied. In the figure, 1 indicates the main device. This main device 1 is connected to n (n: natural number) button telephones 2 ₁ , . . . , 2 _o . Furthermore, the main device 1 has m (m; natural number) central office lines 3.
₁ ,...,3 _n are connected. Specifically, within the main device 1, there are central office line interfaces 4 ₁ ,...4 _n
are provided, and these are connected to corresponding central office lines 3 ₁ ,
..., 3 is connected to _n .

Further, a cross point 5 is provided in the main device 1, and any one of the key telephones 2 ₁ , ..., 2 _o is connected to one of the office line interfaces 4 ₁ , ..., 4 _n , and the final , button telephone 2 ₁ ,
. . , 2 _o is connected to one of the central office lines 3 ₁ , . . . , 3 _n .

Furthermore, the cross point 5 has extension circuits 6 and 7.
is connected, and the button telephone 2 ₁ ,...,2 _o
It is possible to connect within.

In the above configuration, a control section (not shown) having a processor function performs opening/closing control within the crosspoint 5 and receiving incoming signals from the office line interfaces 4 ₁ , . . . , 4 _n .

Next, the button telephone 2 will be explained with reference to FIG. This button telephone 2 is representative of the button telephones 2 ₁ , . . . , 2 _o shown in FIG. The button telephone 2 has a handset 21 and a dial keypad 22. This button telephone 2 can use five office lines, and has office line keys 23 ₁ , 23 ₂ , ..., 23 ₅ and corresponding displays 24 ₁ , 24 ₂ , ..., 24 ₅ is provided. Further, the button telephone 2 is provided with a hold button 25, an add-on button 26 for an add-on conference, an extension key 27, and a corresponding display 28.

Now, when this button telephone 2 is used as the button telephones 2 ₁ , . . . , 2 _o shown in FIG. 1, the number m of office lines is assumed to be 6 or more. Therefore, the button telephone device shown in FIG.
6) Fewer central office line keys 23 ₁ , 23 ₂ , ..., 2
3 ₅ and an extension key 27, a button telephone 2 ₁ ,
..., we will have 2 _o .

Here, the function of the button telephone ₂₁ equivalent to that shown in FIG. 2 will be briefly explained. For example, the central office line key 23
Assume that the station line corresponding to ₁ is station line 3 ₁ in FIG.

When the handset ₂₁ of the button telephone 21 is taken off-hook and the office line key ₂₃₁ is pressed, the off-hook information and the push button information of the office line key ₂₃₁ are taken into a control section (not shown) in the main device 1. Therefore, the control unit checks the service class of the key telephone, and if it is of a service class that can be connected to the central office line ₃₁ and the central office line ₃₁ is not in use, the control unit checks the service class of the key telephone. Make contact.

Therefore, the button telephone 2 ₁ is connected to the central office line 3 _{1 via the clone point 5 and the central office line interface 4 1 .} At this time, a display indicating "in use" is displayed on the display 24 ₁ corresponding to the office line key 23 ₁ of the key telephone other than the key telephone 2 ₁ . In addition, the display 24 ₁ corresponding to the office line key 23 ₁ of the button telephone 2 ₁ has a lighting display or an I-
A use display (a special display to show that the device is in use) is displayed.

Next, assume that the key telephone 2 ₁ in FIG. 1 has a central line key 23 ₁ corresponding to the central line 3 ₁ , but the button telephone 2 _o does not have a central line key corresponding to the central line 3 ₁ . The connection operation between the central office line ₃₁ and the key telephone _2o will be explained.

Since the button telephone 2 _o does not have a central office line key corresponding to the central office line 3 ₁ , the button telephone 2 ₁ and the central office line 3 ₁ are connected, and the final transfer is made by the transfer operation on the button telephone 2 ₁ . Button telephone 2 _o and central office line 3 ₁
Make a connection with Such an operation may be performed when a meeting is required between the user of the key telephone _3o and the other party during a conversation (or after the conversation has ended) with the other party connected via the central office line ₃₁ . It is something that

First, take off the handset 21 of the key telephone ₂₁ and press the central office line key ₂₃₁ corresponding to the central office line ₃₁ .
Press. Then, _the control unit (not shown) performs the connection at point a of the cross point ₅ in FIG.
and via the central office line interface ₄₁ . This state is shown in FIG. At this time, as shown in the figure, the I-use display is displayed on the display 24 ₁ corresponding to the central line key 23 ₁ of the button telephone 2 ₁ , which corresponds to the central line 3 ₁ except for the button telephones 2 ₁ and 2 _o . The indicator corresponding to the central office line 3 ₁ of the button telephone having the central office line key is lit. Of course, these display controls are performed by a control section (not shown).

Next, add-on button 26 of button telephone 2 ₁
When is pressed, a control unit (not shown) detects this and
A connection is made at point b of the cross point 5 in _FIG . As a result, a dial tone is returned from the extension circuit 6 to the key telephone set ₂₁ . At this time, as shown in Figure 3,
The display 24 ₁ corresponding to the office line key 23 ₁ of the button telephone 2 ₁ displays Ex Hold (exclusive hold).
I-use is displayed on the display 28 corresponding to the extension key 27.
A display is made. The display on the display of the other button telephones is the same as in Fig. 3.

Therefore, it is assumed that the speaker of key telephone 2 ₁ makes an extension call of key telephone 2 _o , and the speaker of key telephone 2 _o responds to this call. Then, a connection is made at point c of the cross point 5 in FIG. 1 (FIG. 3). Therefore, the key telephones 2 ₁ and 2 _o are in the extension call state, and the display 28 corresponding to the extension key 27 of the key telephone 2 _o is in the calling state, and the
-called display and responds to I
-use will be displayed. The other button displays on the telephone display are the same as those shown in FIG.

Next, when the speaker of the button telephone ₂₁ presses the add-on button 26 again, the control section (not shown) releases the connection between points b and c of the cross point 5, and
Connect points d and d. Thereby, the button telephones 2 ₁ and 2 _o are connected to the central office line 3 ₁ via the cross point 5 and the central office line interface 4 ₁ as shown in FIG. At this time, the display 28 corresponding to the extension key 27 of the button telephone ₃₁ is turned off.
The display 24 ₁ corresponding to the central office line key 23 ₁ is I-use.
Is displayed. The display of the other button telephones remains as shown in FIG.

Next, the handset ₂₁ of the button telephone 21
When the on-hook is performed, the control unit takes in this on-hook information and sets the cross point a of cross point 5 in FIG.
Open the dot connections. As a result, the button telephone 2 _o is connected to the central office line 3 ₁ via the central office line interface 4 ₁ even though there is no central office line key corresponding to the central office line 3 ₁ (FIG. 3). At this time, the display 24 corresponding to the office line key 23 ₁ of the button telephone 2 ₁
The indicators of key telephones having indicators corresponding to central office lines 3 _{and 1} , including ₁ , will be lit;
"In use" is displayed. In addition, the display 28 corresponding to the extension key 27 of the button telephone 2 _o , which is a key telephone without a display corresponding to the office line 3 ₁ , has an I
-use is displayed, indicating that it is currently in use.

〔Effect of the invention〕

As described above, according to the present invention, even in a button telephone that does not have a central office line key or display device corresponding to a central office line, the status of the central office line can be displayed, giving the speaker a sense of security.

In addition, since there is no special key such as a central office line representative key, there is no need to complicate the configuration of the key telephone.Furthermore, the extension key can be used as it is, and in rare cases, the extension key and its display can be used as is. It can be used as a central office line key and its display.

Therefore, it is convenient for the user because the number of keys used in different ways does not increase.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the main parts of a button telephone device to which the present invention is applied, FIG. 2 is a plan view of the button telephone device used in the present invention, and FIG. 3 is a diagram for explaining the present invention. 1... Main device, 2 ₁ ,..., 2 _o , 2... key telephone, 3 ₁ ,..., 3 _n ... central office line, 23 ₁ , 23
₂ , ..., 23 ₅ ... central line key, 27 ... extension key, 24 ₁ , 24 ₂ , ... 24 ₅ , 28 ... display.

Claims (1)

[Scope of Claims] 1. A main device that performs central office line acquisition control and also has a central telephone transfer control function and an extension call control function, and a central office line key that is connected to this main device and is used to instruct central office line acquisition. , in a central office line status display method for a button telephone device equipped with a plurality of button telephones each having an extension key and an extension indicator for making an extension call, one button telephone acquires the central telephone line and displays the central telephone call status. After that, when transferring the central line call to another key telephone that does not have a central telephone key corresponding to this central telephone, Achieving an extension call state between the office line and the other key telephone, and then changing from the extension call state to a office line call state between the office line and the other button telephone based on a central office line call transfer instruction from the one button telephone. A central line status display method for a button telephone device, characterized in that the extension display of the other key telephone is controlled to display the central line status related to the central line call transfer.