JPS6318856A - Transferring method for trunk line incoming call in private branch exchange - Google Patents

Abstract

PURPOSE:To make a response to a trunk line incoming call in a key number extension even after the transferring mode is changed over by executing the transferring to a special extension automatically after the key number extension is called for a constant time to the succeeding trunk line incoming call when the number of the non-response call of the trunk line incoming call to the key number extension is a prescribed number or above stored beforehand. CONSTITUTION:For example, the number of the setting of call loss information in a memory circuit 4 is 3 and the response waiting time of a key number extension after the changing-over of a transferring mode is 5 in the number of the call sound. When a key number extension A does not respond to the trunk line incoming call, the call loss information from a trunk line trunk 1 is inputted through signal lines 101 and 102 to the memory circuit 4. When this is continued three times, the changing-over command to the transferring mode is outputted from a signal line 103 to a control circuit 3. After the transferring mode is obtained, when the trunk line incoming call is received to the trunk line trunk 1, the control circuit 3 controls a switch circuit 2 through a signal line 104 and at first, connects the trunk line incoming call to the key number extension A. When the key number extension A responds within five times of the number of the call sound, the control circuit 3 inputs the information through a signal line 105 and releases the transferring mode.

Description

[Detailed description of the invention] The present invention is installed in the premises of a business office, etc., and connects a telephone within the business office to a subscriber telephone line (office line), or between telephones within the business office. This invention relates to a method for transferring incoming calls to a central office in a private branch exchange.

Conventional techniques (In corporate private branch exchange equipment, when an incoming call from a central office line is transferred to an extension, the incoming call is generally transferred via a central office relay stand. A private branch exchange system is now used in which a central office line is used as a central office line relay stand, and all incoming calls to the central office line are received on this representative extension line.

Such private branch exchange equipment is equipped with a function that allows incoming calls received at the representative extension to be transferred to a specific predetermined extension in case the subscriber is not present at the location where the representative extension is installed. However, in the past,
When the number of unanswered calls received at the representative extension exceeds a predetermined number, the system switches to forwarding mode, and all subsequent calls to the central office line are automatically forwarded to a specific predetermined extension subscriber. I want it to look like this: Japanese Patent Publication No. 60-1218
No. 67 public tu) 0 shots ■ tried to solve 131 birds 4 tables.

However, if all incoming calls received at the representative extension are automatically transferred to a specific extension as described above,
If the answerer who is supposed to be at the location of the representative extension returns after the number of incoming unanswered calls exceeds the specified number, even if an incoming call to the central office line arrives for that answerer, the answerer There is a problem in that it is not possible to respond to the incoming call on the central office line unless the user goes to the location where the specific extension is installed or cancels the transfer using some other method.

The present invention has been made in view of the above circumstances, and provides a central office line in a private branch exchange device that is capable of responding to incoming calls on the central office line on a representative extension line even after switching to transfer mode. The purpose is to provide a method for forwarding incoming calls.

Means for Solving the Problems In order to achieve the above object, the present invention provides a private branch exchange system in which the representative extension doubles as a central office line relay board and also has an extension transfer function and an extension representative function. When the number of unanswered incoming calls exceeds a predetermined number recorded in advance,
This is a method for forwarding incoming calls to the central office line, which is characterized in that subsequent incoming calls to the central office line are automatically transferred to a specific extension after ringing a representative extension for a certain period of time.

If a call arrives at the representative extension and the subscriber does not answer, the call is lost.

In the present invention, even if the number of consecutive calls exceeds a predetermined number, the representative extension is first called for subsequent incoming calls. If there is no response even after calling for a certain period of time (for example, five rings), the call is automatically transferred to a predetermined specific extension. Therefore, after entering such automatic transfer mode,
If the subscriber responds on the representative extension within the predetermined time, the automatic transfer mode is canceled and the call can be made on the representative extension.

Sue'1-masu The present invention will be described below based on illustrated embodiments.

FIG. 1 shows a block diagram for implementing the method of the present invention, and the configuration is comprised of a central office line trunk 1. A switch circuit 2 connected to this central office line trunk 1. A control circuit 3 connected to the central office line trunk 1 and the switch circuit 2.
A memory circuit 4 connected to this control circuit 3. Line circuits 5A and 5111-5 distributed from the switch circuit 2
1111 and these line circuits 5A and 5 III~
Representative extension A and extension 81 to Bn connected to 5□ respectively
Consisting of

The office line trunk 1 supplies current to the extension line, and incoming calls are sent to the switch circuit 2 via the office line trunk 1.

The switch circuit 2 closes either RA or R+++"Ra□ in response to a switch switching signal sent from the control circuit 3, and transfers the incoming call to the central office line to the line circuits 5A and 5111.
~511. , to representative extension A or extension B.

~Bn.

The control circuit 3 has an extension transfer function for transferring an incoming call to a specific extension, and also has an extension representative function for connecting to another extension if the transferred extension is busy. This control circuit 3 also inputs call loss information from the central office line trunk 1 when the representative extension A does not respond to an incoming call on the central office line, that is, when there is a call loss. Loss information is further output to the storage circuit 4. 1. When a switching command to transfer mode is input from the α circuit 4, subsequent incoming calls to the central office line are first connected to the representative extension A, and if this representative extension does not respond within a certain period of time, the extension transfer function is activated. A connection is made to a predetermined specific extension among extensions B and -Bn. If that extension is busy, the switch circuit 2 is sequentially controlled by the extension representative function until there is an available extension.

The memory circuit 4 counts the call loss information, and when the counted call loss information reaches a predetermined number set in advance, it outputs a switching command to the control circuit 3 to switch to the transfer mode.

In the above configuration, for example, if the number of call loss information settings in the memory circuit 4 is "3" and the response waiting time of the representative extension after switching the transfer mode is "5" in terms of the number of calls, then this private branch exchange device An incoming central office line call is transferred as follows.

First, when the representative vAA does not respond to the incoming call on the central office line, call loss information from the central office line trunk 1 is sent to the signal lines 101 and 10.
2 to the storage circuit 4, and when this occurs three times in a row, a command to switch to the transfer mode is output from the signal line 103 to the control circuit 3. That is, if the representative extension A fails to respond to the incoming call from a total of three people on the central office line, and subsequently fails to respond, the private branch exchange'; A becomes in the transfer mode. When an incoming office line call arrives at the office line trunk 1 after entering the transfer mode, the control circuit 3 controls the switch circuit 2 via the signal line 104, and first connects the incoming office line call to the representative extension line A. and,
If the representative extension A answers within 5 rings, the control? ff1
The 1 circuit 3 inputs the 1 ft information via the signal line 105 and cancels the transfer mode. If the representative extension A does not respond within 5 rings, the control circuit 3 inputs this information from the signal line, controls the switch circuit 2 using the extension transfer function, and transfers the call to a predetermined specific extension (e.g. B,) connects the incoming call to the central office line. If this specific extension is busy, the extension representative function connects the incoming call to the next predetermined extension (for example, internal rM Bz), and switches sequentially until it is connected to an available extension. It controls circuit 2.

It goes without saying that the method of the present invention is not affected by the number of extensions, and the number of call settings in the memory circuit, the response waiting time setting of the representative extension after switching the transfer mode, etc. can also be changed arbitrarily. . Although the response waiting time of the representative extension after switching the transfer mode is determined based on the number of calls in the above embodiment, it may also be set based on time.

As is clear from the above explanation, according to the method for transferring an incoming call to a central office line in a private branch exchange device according to the present invention, even after entering the transfer mode, the call is connected to the representative extension line for a certain period of time. , even if the private branch exchange automatically enters transfer mode because the responder who was at the location where the representative extension was installed has been unplugged for a while, it will remain constant as long as the responder returns to his or her seat. By answering the incoming call on the central office line within the specified time, you do not have to go to the location of the specific extension to which the call is being forwarded, or you have to cancel the forwarding mode in some way. In addition to being able to eliminate the inconvenience caused by calls, it is also possible to obtain extremely useful effects in terms of service to callers.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of a configuration for implementing the method of the present invention.

Claims (1)

[Claims] (1) In a private branch exchange device in which the representative extension doubles as a central office line relay board, and also has an extension transfer function and an extension representative function,
When the number of unanswered calls received by the central office line to the representative extension exceeds a preset predetermined number, subsequent incoming calls to the central office ring will be automatically routed to the specific extension after ringing the representative extension for a certain period of time. 1. A method for transferring an incoming call on a central office line in a private branch exchange device, characterized in that the incoming call is transferred to a private branch exchange.