JPH03110953A - Extension transfer system - Google Patents

Abstract

PURPOSE:To make the transfer complete even when a transfer destination is busy by holding a caller even when a transfer destination extension telephone set is busy, storing tentatively the transfer destination telephone number and calling back the extension telephone set automatically when the transfer destination finishes its call. CONSTITUTION:When a transfer destination extension 2 is busy, a central controller 8 connects a channel between a subscriber circuit 3 and a signal tone generator 10 by controlling a channel switch 5 and controlling simultaneously the signal tone generator 10 to send a busy tone to a reception extension 1 (110). A receiver dials a specific number to store the telephone number of the transfer destination extension to a storage device 9. The central controller 8 controls the signal tone generating circuit 10 to stop the transmission of the busy tone to the reception extension 1 and to inform the end of storage. When the transfer destination extension 2 in busy state reaches an idle state, the central controller 8 retrieves the storage device 9 to confirm the presence of the extension or trunk line in the wait state of a transfer call to the transfer destination extension 2 and executes the transfer destination call procedure 120.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an extension transfer method when a transfer destination extension is busy when a transfer request is made from an extension receiving an incoming call in an automatic private branch exchange.

[Conventional technology]

Traditionally, in this type of extension transfer system, when the transfer destination extension is busy, the receiving extension notifies the caller, disconnects the call or puts the call on hold, and the transfer destination extension The call was redirected when the call ended. The operation will be explained below with reference to FIG. Figure M3 is a block diagram showing an example of an automatic private branch exchange.

Here, incoming calls from central office lines will be explained in particular. When a call is received from the outgoing line 7 to the reception extension 1 through the office line device 6 and the caller wants to talk to the forwarding destination extension 2, the recipient of the reception extension 1 first calls the origination line 7 and the central office line device 61. Communication path switch5. Via the subscriber circuit 3, the central control unit 8
Under the control of the central office, the caller communicates with the calling party on the central line. The caller is
Give the call recipient the extension number of the called party. The receiver temporarily puts the call on hold and dials the transfer destination extension number. The central control device 8 connects the call path switch 5 to the signal tone generator 10 in order to send the holding tone to the calling side station line device 6. At the same time, it is recognized that the transfer destination extension 2 corresponding to the extension number stored in the storage device 9 is busy, and the receptionist is made to hear a busy tone. The caller takes the caller off hold, talks to the caller again, and informs the caller that the transfer destination extension 2 is busy, or the transfer destination extension 2 ends the call. At that time, he started transferring again.

[Problem to be solved by the invention]

In the conventional extension transfer method described above, when the transfer destination's extension phone is busy, the caller is put into a conversation state again by the transferee's hold release request, so the caller is , inform the caller that the transferee is currently on a call, hang up the call, or put the call on hold and confirm that the transferee's extension has ended the call before retransferring the call. The problem is that it takes a lot of time and effort.

An object of the present invention is to provide an extension transfer system that solves the above problems.

[Means for Solving the Problems] The extension transfer method of the present invention is such that when a transfer request is received from the receiving extension of an incoming call in an automatic private branch exchange, the extension destination is busy. When a predetermined special number is received from an extension, the information of the forwarding destination extension and calling line of this incoming call is recorded, and when the forwarding destination extension becomes vacant, the calling line to the forwarding destination extension is indexed from this record and the forwarding destination extension is used. It has a central control unit that connects the caller to the calling line.

〔Example〕

Next, the present invention will be explained with reference to FIGS. 1, 2, and 3.

FIG. 1 is a flowchart showing an example of the process of the present invention, FIG. 2 is a flowchart showing an example of partial details of FIG. 1, and FIG. 3 is a relay system diagram showing an example of an automatic private branch exchange. be.

Here, we will specifically explain the transfer method for incoming calls from central office lines, but it is clear that the same applies to incoming calls from extension lines.

First, according to FIG. 3, the automatic switchboard has reception extension 1, forwarding extension 2. Subscriber circuit, 3/42 call path switch 5
1 line device 61 originating line 7. Central control unit8. Storage device 9
and a signal tone generator 10.

The reception extension 1 receives a call received from the calling line 7 via the central office line device 6, and sends the call to the call path switch 5. This telephone is connected via the subscriber circuit 3 and accepts incoming calls.

The transfer destination extension 2 is a telephone set that becomes the transfer destination by changing the connection of the calling line 7 via the call path switch 5 and the subscriber circuit 4 in response to a request from the caller and an instruction from the reception extension 1. The central controller 8 controls the switching connections of the communication path switch 5 by making full use of the programs and data stored in the storage device 9.

According to FIG. 1, when an incoming call from the originating line 7 is detected by the central office line equipment 6, the central control unit 8 calls the reception extension 1 via the call path switch 5 and the subscriber circuit 3 to call the caller. The incoming call connection procedure (101) is executed to establish a call state with. Higashi M ≠ Nursing # The receptionist using reception extension 1 listens to the extension number of the forwarding destination extension 2 from the caller's state, performs a hold operation, and then dials the phone number of the forwarding destination extension 2. do. When the central control device 8 receives the hold request and the transfer destination number through the above operation, it first connects the communication path between the office line trunk 6 and the signal tone generator 10 by controlling the communication path switch 5, and also generates a signal tone. device 10
A transfer request procedure (102) is executed to send a hold tone to the originating line 7 by controlling the transfer line 7.

The call state of the forwarding destination extension 2 is notified to the forwarding destination extension 2 through the subscriber circuit 4, and the communication path between the subscriber circuit 3 and the signal tone generator 10 is connected by controlling the communication path switch 5. A transfer call procedure (104) similar to the conventional method is executed to control the signal tone generator 10 and send a ring tone to the reception extension l.

If the transfer destination extension 2 is busy in step 103,
First, the central control device 8 connects the subscriber circuit 3 and the signal tone generator 1.
0 by controlling the communication path switch 5, and at the same time controlling the signal tone generating device IO to send a busy tone to the reception extension 1 (110). When the receptionist using the reception extension L hears this busy tone, he or she will look at the special number on the dial dialing station to store the telephone number of the forwarding destination extension in the storage device 9, so this dial information will be recognized as reception (111 ) The central control unit 8 records and stores in the storage device 9 the waiting code and the device number of the central office line device 6 waiting for the transferred call in the area corresponding to the telephone number of the extension 2 to which the incoming call is transferred (112). Next, the central control device 8 controls the signal tone generation circuit 10 to stop sending the busy tone to the reception extension 1 (113) and notifies the end of recording, so that the reception extension 1 receives an on-footer signal indicating that the call has ended (113). 114), and at the same time, the hold tone that was being sent to the calling line 7 is changed to a ring tone and sent (1, 15).

From this state, the transfer destination extension 2, which was busy, becomes empty (11
6), the central control unit 8 searches the storage device 9 and confirms the existence of an extension or central office line waiting for a forwarded call to the forwarding destination extension 2 (117) L, the forwarding shown in FIG. A pre-call procedure 120 is executed.

If the forwarding destination extension 2 remains busy in step 116, it is recognized via the central office line device 6 that the originating line 7 has recovered from the state in which it was listening to the hold tone or ring tone (118). The central control device 8 controls the signal tone generating device 10 to stop the signal tone that was being transmitted, controls the communication path switch 5 to release the connected communication path, and finally opens the storage device 9. The extension telephone number of the forwarding destination extension 2 and the device number of the central office line device 6 stored in are deleted and restored (119) t, and the process ends.

Next, in FIG. 2, in step 117 of FIG.
Since the central control unit 8 has indexed predetermined data from (120), the central control unit 8 first controls the subscriber circuit 4 and sends a paging signal to the transfer destination extension 2 (121), since the central control unit 8 is in a waiting state. )do. From this state, the central control unit 8 recognizes via the subscriber circuit 4 that the extension subscriber using the forwarding destination extension 2 has responded (122), and controls the signal tone generator IO to send the signal to the originating line 7. At the same time, the call path between the subscriber circuit 4 and the central office line device 6 is connected by controlling the call path switch 5, and the forwarding destination extension 2 and the calling line 7 are placed in a call state. (123). Finally, the central controller 8 restores the storage device 9 (124
) The IJ transfer operation ends.

When there is no response to the ringing signal in step 122, the central control unit recognizes via the station line device 6 that the originating line 7 has recovered from the state of listening to the hold tone or ringing tone (130). Step 8 is connected to step 124, which is similar to step 119, in which the signal tone generating device 10 is controlled to stop the signal tone being sent, and the connected communication path is released by controlling the communication path switch 5. do.

It is sufficient that the same function can be achieved even if the operating procedures in the above embodiments are performed in parallel or in reverse order, and the above description of the functional blocks illustrated and described does not limit the present invention.

〔Effect of the invention〕

As explained above, the present invention puts the caller on hold even if the forwarding destination extension telephone is busy, temporarily stores the forwarding destination extension telephone number, and the forwarding destination ends the call. By automatically calling the extension, the person transferring to the extension can complete the transfer even if the destination is busy, and the caller can also avoid having to ring again. It has the effect of making it necessary.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing an embodiment of the extension transfer method of the present invention, FIG. 2 is a flowchart showing an example of partial details of FIG. 1, and FIG. 3 is a block diagram showing an example of an automatic private branch exchange. . 1... Reception extension, 2... Transfer destination extension,
3, 4... Subscriber circuit, 5... Call path switch, 6... Office line equipment, 7... Outgoing line, 8... ...Central control unit, 9...
Storage device, 10...Signal tone generator.

Claims (1)

[Claims] When a transfer request is made from the receiving extension of an incoming call in an automatic private branch exchange When a predetermined special number is received from the receiving extension in the extension transfer method when the forwarding destination extension is busy The destination extension of this incoming call and a central control unit that records information on the outgoing line and, when the forwarding destination extension becomes vacant, indexes the outgoing line to the forwarding destination extension from this record, calls the forwarding destination extension, and connects it to the outgoing line. Extension transfer method.