JPS59154865A - Display and callback system of call abandoned halfway - Google Patents

Abstract

PURPOSE:To attain display of a stored content and automatic callback of a caller by storing an outgoing subscriber number whose calling is abandoned on the way in extension connection to a main storage device to use the operation of a multi-functional telephone set from a called subscriber. CONSTITUTION:The outgoing extension telephone TEL1 and a multi-function telephone set DFP2 are accommodated in a switch SW30 of a private branch exchange PBX and extension connection is attained. The DFP2 is provided with a display device 20 of opposite subscriber numbers, a display button 21 of subscribers abandoned on the way of calling and a callback button 22, the PBX3 is provided with a central controller CPU32 connected with the SW30 via a bus 31 and a main storage device MM33, which has an area AM34 storing the outgoing subscriber number abandoning the call on the way. When the TEL1 encounters the busy state of the DFP2 or non-response during the calling of the DFP2 and the call is abandoned on the way, the DFP2 subscriber depresses the display button 21 to recognize the outgoing number abandoning the call on the way, and the callback button 22 calls back the caller abandoning the call on the way.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an abandoned call display and call return system, and particularly to an automatic private branch exchange system that accommodates a multi-function telephone set, in which a call is not completed due to the called party being busy or not answering, and the call is called back. The present invention relates to a display of an abandoned call and a call return method when a call subscriber abandons the call.

Conventionally, in internal line interconnection in this type of automatic private branch exchange equipment, the calling subscriber issues a busy tone or a ring tone when the called subscriber is busy and the called subscriber is not responding. continue. If the former is busy, the service is performed using known techniques such as extension camp-on, busy transfer, or step call, and if the latter is no response, the generally known no-response transfer service is performed. Ru. However, there is no known service when the caller abandons the call while listening to the above busy tone, and the called party is busy and the friend is absent. Since there is no record of incoming calls addressed to you at the same time, the called party is
There was a drawback that there was no section that knew 'Lf.

It is an object of the present invention to eliminate the above-mentioned disadvantages by storing in the main memory the number of the calling subscriber who abandoned the call in extension interconnection, and to enable the called subscriber to easily operate the multi-function telephone. An object of the present invention is to provide a previously unknown abandoned call display and callback system that enables display of stored contents and automatic callback of a calling subscriber.

The abandoned call display and call-back method according to the present invention is such that in an automatic private branch exchange system that accommodates a multi-function telephone @ having a number display means for displaying the entire number of the called party, the calling extension telephone calls all of the multi-function telephones. A storage area is provided in the main storage device for storing subscriber number information of the calling extension telephone when the call is abandoned due to encountering the called subscriber being busy or unresponsive; The first operation causes the entire contents of the storage area to be displayed on the number display means, and then the second operation causes the display to be automatically returned to the calling extension telephone within the outgoing call. It is characterized by what it does.

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

FIG. 1 is a block diagram showing an example of the abandoned call display and callback method of the present invention, and FIG. 2 is a block diagram showing an example of the abandoned call memory in FIG. In Figure 1, a calling extension telephone @ (device) l and a multi-function telephone (
(hereinafter referred to as DFP) 2 is an automatic private branch exchange (hereinafter referred to as PABX)
3 switches (hereinafter referred to as 5W) 30 housed in the internal line interconnection are performed. The DFP 2 includes a number display 20 for displaying the subscriber number of the other party, an abandoned subscriber display button (hereinafter simply referred to as a display button) 21, and a call back button 22, and the PABX 3 is connected to the 5W 30 and the bus 311. A general central processing unit (hereinafter referred to as CPU) 32 connected via
and a main memory device (hereinafter referred to as MM) 33, a nuclear MM33
The abandoned call memory (μ lower AM) 3 stores the subscriber number information of the calling extension subscriber who abandoned the entire call in a specified area.
4 can be impregnated. Next, in FIG. 2, the AM 34 is composed of a plurality of storage areas A, B, to N for 1) FIJ, and it is shown in purple that n, for example, S bytes are allocated to each of the valley storage areas. Note that this number of bytes is just an example, and if the AM3 has sufficient capacity necessary for the PABX 3,
Needless to say, you should prepare on 4th.

Subsequently, when Station 1 encounters the subscriber of DFP 2 busy while calling the DFP:l, listens to the busy tone, and goes on-hook after the friend, Mayu goes on-hook while listening to the ninth ring tone of the subscriber not answering. The operation of this embodiment will be explained using the following case example. In any of the above cases, the call is abandoned. It is assumed here that the storage area allocated to the DPP 2 is storage area 8 shown in FIG. First, if the above-mentioned abandoned call occurs, l! In the PABX 3, the subscriber number of the previous device I is written into an empty byte (for example, the first byte) of the storage area A using a generally known method. That is, the CPU 32 monitors the subscriber line to the previous device 1 and
Did l abandon the call to the DFP2? and converts the storage location information of the 'I'EL l on the 5W30 into subscriber number information, and connects the bus 31. A via MM33
The subscriber number information is written into the predetermined storage area 8 of M34. Note that in storage area A, calling extension subscriber number information is sequentially stored from the 2nd byte to the 5th byte each time an abandoned call addressed to the DPP 25- occurs.
When the sixth abandoned call occurs, the calling extension subscriber number information is written by erasing the first byte.

Next, when the DFP2 subscriber abandons the call and calls back the calling extension subscriber, when the DFP2 subscriber presses the display button 21, the CPU 32, 8W30. Bus 31? 1-1a, the content of the first byte is read out to the storage area of AM34 using a generally known method based on the 9-button information received through
Since the transmission is to FP2, the calling extension @ (i.e.
) is displayed on the number display 20. Subsequently, the DFP2 subscriber presses the display button 211? Each time the button is pressed, the contents of the 2nd to 5th bytes of the storage area A are sequentially displayed on the number display and the state returns to an empty state (display operation). When the PABX 3 goes off-hook and hears the dial tone, and then presses the callback button 22 (e.g., the function button "K"), the automatic callback operation of the previous device I is activated in a generally known manner in the PABX 3. conduct. In other words, the CPU 32 presses the call back button 22f''!
! Based on the information, general incoming call connection control to the terminal is performed using the subscriber number corresponding to the first byte of the storage area A. In response to the subscriber's response, the CPU 32 erases all the contents of the first byte of storage area A, and erases the contents of the second and subsequent bytes? Control is performed to sequentially rewrite to the smallest numbered byte (callback operation). This call-back operation is repeated every time the DFP2 subscriber performs a call-back operation.

Even if the called subscriber is a DF'P subscriber outside the DFP 21M, the display of the subscriber number of the abandoned calling extension telephone and the call-back operation are the same, so a description thereof will be omitted.

In addition, in this embodiment, a general telephone is used as the calling extension telephone.
Needless to say, the companion may be a multi-function telephone.

As is clear from the above explanation, according to the abandoned call display and call-back system of the present invention, the called party 7 - the multi-function telephone subscriber can easily operate the buttons.
By displaying the number of the calling subscriber who abandoned the call, it is possible to automatically call back the calling subscriber without having to dial the calling subscriber's number. The effect is that it is possible to realize a convenient abandoned call display and call return service that was previously unavailable.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the abandoned call display and callback system of the present invention, and FIG. 2 is a block diagram showing an example of the abandoned call memory in FIG. In the figure, ■... Calling extension telephone device, 2
...Multi-function telephone DFP% 3 ...Automatic purchase exchange system PABX, 20 ...Number display, 21 ...Abandoned subscriber display button , 22・
...Call back button, 30...Switch S
W, 31. Old bus, 32. Central processing unit CPU, 33. Main memory MM. ＼ COλ

Claims (1)

[Claims] In a multi-function telephone with a number display means for displaying the number of the other subscriber @ fully accommodated automatic private branch exchange, one calling extension room machine encounters the called subscriber is busy or does not answer while the multi-function telephone is ringing the entire multi-function telephone. A storage area is provided in the main storage device for storing subscriber number information of the calling extension telephone when the call is abandoned midway through, and the contents of the storage area are saved by a first operation by the multifunction telephone subscriber. Displaying the number on the number display means, and then by performing a second operation, automatically calling back the phone number that is displayed on the phone. display and callback method.