JPH05122365A - Callback setting system at arrival of dial-in call - Google Patents

Abstract

PURPOSE:To attain the setting of a callback at the arrival of a dial-in call by allowing a caller setting the callback to make an exchange recognize and store its own subscriber number based on dial information. CONSTITUTION:A central controller 6 reports it to a caller 3 when a called extension subscriber 1 is busy or in the lockout state at the time of arrival of a dial-in call, and requests dialing of a special number for callback setting, a toll station number of a caller, a local number and a subscriber number of the caller when the setting of callback is desired, and stores the numbers. After the called extension subscriber is restored, the called extension subscriber 1 is called and after the reply of the called extension subscriber 1, the setting of the callback is informed and the called extension subscriber 1 is connected to a main wire trunk 10 and the toll station number, the local station number and the subscriber number of the caller received and stored by the caller 3 are sent to a telephone network.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic private branch exchange, and more particularly to a call-back system for dial-in.

[0002]

2. Description of the Related Art Conventionally, in this type of call-back system, the subscriber number of the caller who sets the call-back needs to be recognized by the exchange. It was effective in.

[0003]

In the above-mentioned conventional call-back method, in the case of a dial-in incoming call, there is a drawback that the caller's subscriber number cannot be recognized by the exchange, so that the call-back cannot be set. It was

An object of the present invention is to provide a call-back setting method for dial-in incoming calls, which allows call-back setting of dial-in incoming calls.

[0005]

A call back setting method for dial-in incoming call according to the present invention is an electronic private branch exchange, and when a called-in extension subscriber is busy or locked out at the time of dial-in incoming call, a call is made. If the called party is informed that the called extension is busy or locked out, and the caller wants to set up a call back, the special number for call back setup and the caller's A means for requesting dialing of the area code, local area code, and subscriber number, and reception of a special number for setting up a callback and the area code, local area code, and subscriber number dialed by the calling party, Means for storing and means for calling the called extension subscriber after the called extension subscriber is busy or recovered from the lockout state, and after the called extension subscriber responds, the called extension subscriber is busy or There is a dial-in incoming call while the call is out, and the call back is set, and the called extension subscriber is connected to the central line trunk and Area code, city code,
When the dial-in caller encounters the busy or locked-out state of the called extension subscriber, the dialing information from the caller is used to send the subscriber number to the telephone network. Make the exchange recognize the area code, local area code, and subscriber number of the caller, and set the call back.

[0006]

The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention.
The exchange includes a sound synthesizer 7, an audible sound transmitter 8 and a DI.
A subscriber 3 is accommodated in the D trunk 4 via the telephone network 2.

Now, when the extension subscriber 1 is busy, the telephone network 2
Subscriber 3 dials the area code, local code, and subscriber number of extension subscriber 1. Telephone network 2 is DID trunk 4
And the subscriber number of the extension subscriber 1 is transmitted. DI
The subscriber number of the extension subscriber 1 received by the D trunk 4 is
It is counted by the register 5.

The central processing unit 6 recognizes that the subscriber number received by the dial information counted by the register 5 is currently in a busy state, and the dial-in incoming call from the subscriber 3 is made into a sound synthesizing device. Connect to 7.

The sound synthesizer 7 informs the subscriber 3 that the extension subscriber 1 is currently busy and, if the subscriber 3 wants to set the call back, a special feature for setting the call back. Request the subscriber 3 by dialing the number and the area code, local code, and subscriber number of the subscriber 3.

The central processing unit 6 connects the subscriber 3 to the audible tone sending device 8 and sends a dial tone to the subscriber 3. The subscriber 3 receiving the dial tone dials the special number for setting the call back. The special number dialed by the subscriber 3 is sent to the DID trunk 4 via the telephone network 2 and counted by the register 5.

The central processing unit 6 recognizes that the dial information counted in the register 5 is a special number for setting a call back, and sends out a special dial tone from the audible sound sending unit 8 to the subscriber 3. The subscriber 3 receiving the special dial tone dials the area code, local code, and subscriber number of the subscriber 3 itself. The dial information from the subscriber 3 is counted by the register 5, stored in the memory area of the main storage device 9, and the callback is set.

When the telephone call of the extension subscriber 1 is completed, the central processing unit 6 calls the extension subscriber 1. When the extension subscriber 1 responds, the central processing unit 6 connects the extension subscriber 1 to the phonetic synthesizer 7, and there is a dial-in incoming call while the extension subscriber 1 is talking and a call back is set. To extension subscriber 1.

Thereafter, the central processing unit 6 determines that the extension subscriber 1
Is connected to the trunk line trunk 10 and the sender 11 sends out the area code, local code and subscriber number of the subscriber 3 stored in the main memory 9 to the telephone network 2. The telephone network 2 calls the subscriber 3 according to the received dial information. Here, the extension subscriber 1 and the subscriber 3 are connected via the telephone network 2 in response to the subscriber 3's response.

[0014]

As described above, according to the present invention, a caller who sets up a call back recognizes and stores his / her own subscriber number in the exchange by dial information.
It is possible to set a callback for dial-in incoming calls.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

[Explanation of symbols]

 1 Extension subscriber 2 Telephone network 3 Subscriber 4 DID trunk 5 Register 6 Central processing unit 7 Sound synthesis device 8 Audible sound sending device 9 Main storage device 10 Station line trunk 11 Sender 12 Speech path switch

Claims (1)

[Claims] 1. In an electronic private branch exchange, when a called extension subscriber is busy or locked out when a dial-in is received, the called extension subscriber is busy or locked out to the calling party. If the caller wants to set up a call back and the caller wants to set up a call back, the caller needs to dial a special number and the caller's area code, local code, and subscriber number. Means, a means for receiving and storing a special number for setting up a callback dialed by the caller and the area code, local code, and subscriber number, and the called extension subscriber is busy or locked out. After the call is restored, the means to call the called extension subscriber and after the called extension subscriber answers, there is a dial-in incoming call while the called extension subscriber is busy or locked out, and the callback is set. The The caller's area code, local code, and subscriber number sent from the caller to the telephone network. When the dial-in caller encounters the busy or locked-out state of the called extension subscriber, the dialing information from the caller allows the area code and local area code of the caller to be dialed. Callback setting method for dial-in incoming call, characterized in that the subscriber number is recognized by the exchange to set the callback.