JP2826542B2 - Automatic telephone exchange - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic telephone exchange, and more particularly to an automatic telephone exchange, in which, after a call is completed, when a return call is made from the telephone on the receiving side to the telephone on the calling side during the previous call, the telephone number of the other party is changed. The present invention relates to an automatic telephone exchange that can automatically make a call based on the telephone number of the other party stored during the previous call without dialing.

[0002]

2. Description of the Related Art Conventionally, this type of automatic telephone switching system requires that the receiving side return to the calling party after the end of the call with the calling party, as disclosed in, for example, Japanese Patent Application Laid-Open No. 7-183950. In some cases, it has been used to make calls without knowing the caller's telephone number.

FIG. 3 is a block diagram showing a configuration of a conventional automatic telephone exchange. In FIG. 3, when a call is made from the telephone set 1 to the telephone set 2, the central processing unit 4b detects this and switches the switch 3 with reference to the telephone numbers of the telephone set 1 and the telephone set 2 stored in the storage device 5. The telephone 1 and the telephone 2 are connected, and a telephone call is performed between the telephone 1 and the telephone 2. When the telephone 1 and the telephone 2 enter the talking state, the central processing unit 4b notifies the storage device 6 that the telephone 1 and the telephone 2 have entered the talking state together with the telephone numbers of the telephones 1 and 2. Remember. After the call between the telephone 1 and the telephone 2 is completed, it is necessary to make a return call from the telephone 2 on the receiving side to the telephone 1 on the calling side during the above-mentioned telephone call. When the telephone 2 sends a predetermined signal for requesting a call to the telephone 1 by operating the dial key on the telephone 2, the central processing unit 4 b receives this signal and Telephone 1
In response to the call request, the storage device 6 confirms whether or not the call information between the telephone 1 and the telephone 2 is stored. If the call information between the telephone 1 and the telephone 2 is stored in the storage device 6, the central processing unit 4b reads the telephone number of the telephone 1, and based on the read telephone number, the telephone 1
, It is possible to make a return call to the telephone 1 without knowing the telephone number of the telephone 1.

[0004]

The above-described conventional automatic telephone exchange stores the telephone number of the calling telephone when a call is made. On the receiving side, this state is maintained even after the call is terminated. Since it is held until there is a call, when the called party calls a phone other than the phone of the caller before the next incoming call, the call to the phone of the caller due to incorrect key operation The central processing unit reads out the telephone number of the previous calling telephone from the storage device and erroneously calls the preceding calling telephone. Has disadvantages.

It is an object of the present invention to provide an automatic telephone exchange which can prevent an erroneous calling operation due to an erroneous operation when making a return call from a called side to a calling side immediately after a call ends.

[0006]

Automatic telephone exchanges of the present invention SUMMARY OF THE INVENTION the telephone number of the second telephone Ru telephone der the called party the telephone number of the first telephone was calling phone during a call <br /> are both stored, when the call back from the second telephone after the call is terminated to the first telephone, the second
From the first telephone to the first telephone by operating the input means
Call request to the automatic telephone exchange
Is sent, the signal is received and the signal is received.
The first telephone number stored with the telephone number of the second telephone
An automatic telephone exchange automatically calling the first telephone based on the telephone number of the first telephone.
Configured to store the telephone number after a call ends as erase and held for a certain time determined in advance.

[0007]

In the automatic telephone exchange according to the present invention, the telephone number of the first telephone which was the originating telephone at the time of a call is replaced by the telephone number of the second telephone which is the receiving telephone. Storage means for storing both of them, and when making a return call from the second telephone to the first telephone after the end of the call, operating the input means from the second telephone to the first telephone. When a predetermined signal for requesting the automatic telephone exchange to make a call is transmitted, the signal is received.
Reading the telephone number of the first telephone stored in the storage means together with the telephone number of the second telephone ;
An automatic telephone exchange comprising: a calling / receiving connection control means for automatically calling the first telephone based on the read telephone number; and a time management means for outputting time information; The connection control means stores the time information output from the time management means at the end of the call in the storage means, and the time information at the end of the call and the current time information output from the time management means. When the signal is not received even after a predetermined period of time elapses after the end of the call, if the signal is not received, the telephone number of the telephone set as the calling side stored in the storage means is stored. It is configured to perform erasure.

Further, the automatic telephone exchange according to the present invention, when receiving the signal before reaching a predetermined time after the end of the call, renews the predetermined time from the time when the signal is received. The telephone number is retained until a predetermined time period is reached, and then the telephone number is deleted.

Further, the automatic telephone exchange according to the present invention is configured using a dial key as the input means.

[0011]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an automatic telephone exchange according to the present invention.

The automatic telephone exchange according to the present embodiment shown in FIG. 1 has a switch 3 for forming a communication path between telephones 1 and 2, a storage device 5 for storing telephone numbers of telephones 1 and 2, A storage device 6 for storing the telephone number of the calling telephone and the telephone number of the called telephone at the time;
Controlling the switch 3, the storage device 5, and the storage device 6,
It comprises a central processing unit (outgoing / incoming connection control means) 4a for performing connection control at the time of incoming and outgoing calls, and a time management device 7 for outputting time information to the central processing unit 4a.

Next, the operation will be described.

In FIG. 2, the state of step (hereinafter, referred to as S) 1 means that the automatic telephone exchange is in the operating state but the outgoing / incoming call connection control is not performed (the event waiting state). Show. In this state, a call is made from the telephone set 1 to the telephone set 2. When the central processing unit 4a detects a call from the telephone set 1 to the telephone set 2 (S2), the central processing unit 4a is stored in the storage unit 5. The telephone numbers of the telephones 1 and 2 are confirmed, and connection control to the telephone 2 is performed on the switch 3 (S3), and it is confirmed that the line connection is completed by the switch 3 (S4). The line is connected, and the telephones 1 and 2 enter a talking state. Further, when confirming that the line connection is completed in S4, the central processing unit 4a stores the telephone numbers of the telephones 1 and 2 in the storage device 6 (S5), and returns to S1. Next, when the telephone call between the telephone 1 and the telephone 2 is completed, the central processing unit 4a sets the telephone 1
Detecting the end of the call between the telephone and the telephone 2, disconnects the call line (S6), inputs the current time information from the time management device 7, stores the call end time in the storage device 6 (S7), and returns to S1. . In this state, if it is necessary to make a return call from the telephone 2 on the receiving side to the telephone 1 on the calling side at the time of the above-mentioned call, and to make a call from the telephone 2 to the telephone 1, When a predetermined call request signal for requesting a call to the telephone 1 that was the originating side at the time of the previous call is transmitted to the central processing unit 4a by the operation, the central processing unit 4a transmits the signal from the telephone 2 to the telephone 1. Is received (S8), and it is confirmed whether or not the communication information between the telephone 1 and the telephone 2 is stored in the storage device 6 (S9). If the call information between the telephone 1 and the telephone 2 is stored in the storage device 6, the central processing unit 4a
Retrieves the telephone number of the telephone 1 and makes a call to the telephone 1 (S10). If the communication information between the telephone 1 and the telephone 2 is not stored in the storage device 6 in S9, it is determined that the communication information between the telephone 1 and the telephone 2 is not stored in the storage device 6. Notify the telephone 2 (S1
1) Return to S1. After the end of the call, the central processing unit 4a
When the current time information is input from the time management device 7 and the current time indicated by the input current time information is compared with the call end time stored in the storage device 6 to detect that a predetermined time has elapsed (S12). ), Deletes the call information between the telephone 1 and the telephone 2 stored in the storage device 6 (S1).
3). If the central processing unit 4a receives the call request signal before the fixed time elapses after the end of the call, the predetermined fixed time starts again from the time when the call request signal is received. The telephone number is retained until the time is reached, and then the telephone number is deleted.

In the above description, if the central processing unit 4a receives the call request signal before the fixed time elapses after the end of the call, the time when the call request signal is received is renewed. It is described that the telephone number is retained until the predetermined time reaches the predetermined time and then the telephone number is deleted. However, even when the central processing unit 4a receives the call request signal again, The operation may be repeated such that the telephone number is retained for a period of time from when the call request signal is received until the predetermined time is reached, and then the telephone number is deleted. . Further, the telephone number may be deleted once the call request signal is received and the communication state is entered again.

[0017]

As described above, the automatic telephone exchange according to the present invention includes time management means for outputting time information, and the call connection control means controls the time information output from the time management means at the end of the call. That is, the call end time is stored in the storage means, the stored call end time is compared with the current time information output from the time management means, and even if a predetermined time has elapsed since the end of the call, If the signal was not received, it was stored in the storage means,
By erasing the telephone number of the telephone that was the calling side in the previous call, it is possible to prevent an erroneous calling operation due to an erroneous operation when returning a call from the called side to the calling side immediately after the end of the call. It has the effect that it can be done.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of an automatic telephone exchange according to the present invention.

FIG. 2 is a flowchart showing an example of an operation in the automatic telephone exchange according to the present embodiment.

FIG. 3 is a block diagram showing a configuration of a conventional automatic telephone exchange.

[Explanation of symbols]

 1, 2 telephone set 3 switch 4a, 4b central processing unit 5 storage device 6 storage device 7 time management device

Claims (4)

(57) [Claims] 1. A telephone number of the first telephone was calling phone together stores the telephone number of the second telephone is called phone during a call, the from the second telephone after call ends When making a return call to the first telephone, a predetermined signal for requesting the automatic telephone exchange to make a call to the first telephone is transmitted from the second telephone by operating the input means. And an automatic telephone exchange that receives the signal and automatically calls the first telephone based on the telephone number of the first telephone stored with the telephone number of the second telephone . An automatic telephone exchange, wherein the telephone number of one telephone is stored and erased for a predetermined period of time after the end of the call. Wherein the telephone number of the second telephone the telephone number of the first telephone was calling phone was called phone during a call and both storage means for storing, said after the call is finished second of the case of the call back to the first telephone from the telephone, by operating the input means from said second telephone call to the automatic telephone exchange essential <br/> for seeking to the first telephone When a predetermined signal is transmitted, the signal is received and the telephone number of the second telephone is received.
Read together telephone number of said storage means said first stored in the telephone automatically and an incoming and outgoing call connection control means for performing a call operation to said first telephone based on the read the telephone number The automatic telephone exchange further includes time management means for outputting time information, wherein the call connection control means stores the time information output from the time management means at the end of the call in the storage means, Comparing the time information at the end time and the current time information output from the time management means, if the signal is not received even after a predetermined time has elapsed after the end of the call, An automatic telephone exchange, wherein the telephone number of the telephone set as the calling side stored in the storage means is deleted. 3. The automatic telephone exchange according to claim 2 , wherein, when the signal is received before reaching a predetermined time after the end of the call, the signal is received again from the time when the signal is received. The automatic telephone exchange, wherein the telephone number is retained until the predetermined time is reached, and then the telephone number is deleted. 4. The method of claim 1, in the automatic telephone exchange according to claim 2 or claim 3, wherein the input means, an automatic telephone exchange, which is a key for dialing.