JPS60116266A - Extension callback system - Google Patents

Abstract

PURPOSE:To call back at an optional time a call to a sender not responded to because of the absence of an extension subscriber by providing a special number identifier and an incoming call information storage device. CONSTITUTION:When an optional extension, e.g., an extension A dials the 1st special number, the number is identified by a special number identifier 2. Then a central controller 3 writes incoming inhibiting information to a memory corresponding to the extension A of the incoming call information storage device 4 so as to inhibit an incoming call to the extension A. The sender information transmitted to the extension A is written in a memory corresponding to the storage device afterward. When the extension A dials the 2nd special number, the sender information to the extension A stored in the storage device 4 calls the sender, e.g, the extension B. Thus, callback is attained an optical time to the sender not responded to because of the absence or the like of the extension subscriber.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an extension callback system in an automatic private branch exchange.

Prior Art Conventionally, in an automatic private branch exchange system, if the person dedicated to a certain extension telephone is absent or busy and cannot answer an incoming call to that extension, the call is forwarded to that extension by no-answer forwarding or missed call forwarding. Incoming calls are automatically routed to a central office or another extension. Therefore,
The person dedicated to the extension will use the message number from the person who answered the forwarding destination to 1Ji1 the extension number of the caller who received the call while he was absent, and it will be his turn to call and talk to the caller. .

Furthermore, it is extremely inconvenient that the sender cannot be called when there is no Hongji message.

OBJECTS OF THE INVENTION It is an object of the present invention to overcome the drawbacks of the prior art mentioned above and to enable 'l!' by dialing a special number from any extension. J
To provide an extension callback method that automatically calls a caller who called the extension while prohibiting incoming calls by prohibiting incoming calls to the extension and dialing +1-, C, and another special number. be.

Structure of the Invention The extension Neil/Herataka system of the present invention is based on a mobile private branch exchange system including a special number identification device connected to a calling register and capable of identifying first and second special numbers, and a special number identification device connected to a central control device and capable of identifying first and second special numbers. an incoming call information storage device for storing information for prohibiting incoming calls to the extension corresponding to the number and information of a caller who called the extension during the incoming call prohibition, When the special number 1 is dialed, it is identified by the special number identification device, and the central control device stores incoming call prohibition j1-information in the memory corresponding to the extension in the incoming call information storage device and dials the number. j
Incoming calls to extension A are prohibited, and the caller information for subsequent calls to that extension is written into the incoming call information record (corresponding memory of the 4J device), and when the extension dials the second special number.

The present invention is characterized in that the caller is automatically called based on caller information for the extension stored in the incoming call information storage device.

Embodiments of the Invention Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the implementation side of the present invention. That is, the automatic private branch exchange switch SW includes a plurality of subscriber circuits (LC) 6i and internal inter-extension trunks (IO
T)5. Outgoing register (ORT) IAv- is connected,
The automatic private branch exchange switch SW is operated under the control of the central control unit 3 to connect the extension telephones 5UB-A and 5UB-B of σ, as in the conventional case. special number identification device 2,
An incoming call information storage device 4 connected to the central control device 3 is also provided. Then, after the extension telephone 5uB-A picks up the handset and hears the dial tone from the calling register 1, it dials the first special number for prohibiting the incoming call number 8, and the calling register 1 changes to the extension telephone. The dial pulse from 5UB-A is multiplied by 1; 1 number and 1; at the same time, this dial sends a t-report to the special number identification device 2. When the special number identification device t2 identifies that the received number is a second special number, it sends the special number to the central control device 3. At the same time, caller information and number f+ are sent from call register 1.
'j information etc. is sent to the central control device 3. The central control device 3 learns from the information sent from the calling register and the special number identification device 2 that the extension telephone 5UB-A is in a state of emergency (11), and records the incoming call information tα.
The system 14 is activated and the telephone information is set in the memory corresponding to the extension telephone fiSUB-A in the incoming call information storage system 4.

The incoming call information record t0 must be set to 1 for each extension.
1 information and information on the name of the caller who called the extension while incoming calls were prohibited. For example, when extension telephone 5UB-B tries to call extension telephone 5UB-A, it lifts the handset and hears dial I -7 from call register l, and then calls extension telephone 5UB-A. When a number is dialed, the calling register 1 sends the caller v1 information of the extension telephone 5UB-H and the number information of the other party (number information @i of the extension telephone 5UB-A) to the central control unit 3. Based on the above information, the central control unit δ3 activates the incoming call information storage device 4, reads the memory corresponding to the called extension A, and identifies whether incoming call prohibition information is set in the memory. Since the extension telephone 5UB-A is currently setting incoming call prohibition information, the central controller 3 stores the number of the calling extension B in the incoming call information memory corresponding to the extension telephone 5UB-A in the incoming call information storage device 4. Store information temporarily. All incoming calls to the extension telephone 5UB-A in which the extension telephone 5UB-A is prohibited from receiving calls are stored in the corresponding memory in the incoming call information storage device 4 in the same way.

Next, when extension A wants to cancel the incoming call ban, after lifting the handset and hearing the dial from call register 1,
Dial the second special number to cancel the call ban. This dial information is sent from the calling register l to the special number identification device 2 in the same way as described above, and is identified by the special number identification device 2 as a special number, and the number information of the caller (SUB-A) and the special number information are sent to the special number identification device 2. is sent to the central control device 3, and the central control device 3 identifies from the above information that extension A wishes to cancel the incoming call prohibition, activates the incoming call information storage device 4, and stores the incoming call information storage device. of extension B from memory in contrast to extension A in 4! The S information is read out and the extensions A and B are interconnected via the extension trunk 5.

This allows you to talk to either extension A or extension B. After the call is completed, when the central control unit i9.3 detects that extension A is on-hook, it activates the JJ incoming call information storage device z4 again and makes the next outgoing call registered in the incoming call information memory corresponding to extension A. The caller's number information is read out and the caller is connected to extension A. Similarly, all callers registered in the incoming call information memory corresponding to extension A are sequentially connected.

FIG. 2 is a diagram showing an example of an information transmission path in the above embodiment. That is, the dial information dialed by the caller is sent from the call register l to the special number identification device 2 through the dial information transfer path a, and after the special number identification device 2 identifies the special number, the dial information is sent from the call register 1 to the caller. The information and the number information are sent to the central control device 3 via the caller information transmission path and the number information transmission path C, respectively, and the special number information from the special number identification device 2 is sent to the central control device 3 via the special number information transmission path d. . Further, setting and canceling the incoming call prohibition and reading out the 7 yen prohibition information are performed between the central control unit 3 and the incoming call information storage device 4 via the incoming call prohibition information transmission path e. In addition, if a call is received to the extension while calls are prohibited on the 1st floor, the central control device 3 transfers the caller information to the incoming call information transmission path f-1 based on the information received from the calling register l and the special number identification device 2. -fn to arrive (i) and is sent to the call information storage device 4 and temporarily stored.

Effects of the Invention As described above, in the present invention, when an extension subscriber dials a first special number, incoming calls to the extension are prohibited, and when the subscriber dials a second special number, the above-mentioned incoming call prohibition is canceled. If there is an incoming call to the extension that is prohibited from receiving calls, the 4C call information storage device will place a call in the memory corresponding to the extension, temporarily store the number of the first party, and send the number to the extension or the second special call. When you dial a number to cancel the call ban, 1- Since the configuration is configured to connect the caller to the extension, you can use it at any time for callers who do not answer because the extension subscriber is absent or busy. It is possible to make a callback using RRF.It is effective in preventing busy extension subscribers from interrupting their work due to telephone calls, and improving the service for incoming calls when they are not available.In addition, it is effective in preventing calls from being interrupted by telephone calls of busy extension subscribers. It is also possible to apply the non-invention to S-His.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing an information transmission path in the above embodiment. In the figure, 2: special number identification device, 3: central control device, 4: incoming call information storage device, 5:
Extension phase η rank, 6: subscriber circuit, SW: automatic private branch exchange switch, 5UB-A, 5UB-B: extension telephone. Applicant NEC Corporation Agent Patent Attorney Toshimune Sumita

Claims (1)

[Claims] In an automatic private branch exchange, there is a special A number 1 identification line which is connected to the dialing register and can identify the special numbers 1 and 5S2, and a special A number 1 identification line which is connected to the central control unit and prohibits incoming calls to the extension in accordance with the extension number. information and an incoming call information storage device for storing the information of the caller who called the extension while the extension was prohibited,
When a special number is dialed, it is identified by the 1iff special number identification device, and the central control unit writes incoming call prohibition information in the memory corresponding to the extension in the incoming call information storage & storage area, and prevents calls from reaching the extension. Forbid incoming calls [1-] and write the caller information for subsequent calls to the extension into the corresponding memory of the foil call information storage device,\14
When the extension dials the second special JA number, the caller is automatically called based on the caller information for the Kito 1 extension stored in the L incoming call information storage device. Extension call/hetsuta method.