JPH02119366A - Telephone exchange - Google Patents

Abstract

PURPOSE:To enable an incoming call to be communicated immediately with an objective telephone set user by calling a telephone set being a sender when a busy transfer calls a transfer destination telephone set and the telephone set of the transfer destination is idle before the transmission destination telephone set replies. CONSTITUTION:A call is set from a telephone set 1 to a telephone set 2, and if the telephone set 2 is busy, a transfer destination telephone set 3 and a call signal trunk 6 are connected via a channel 7 and the caller telephone set 1 and a call tone trunk 4 are connected. Then the information representing the busy state of the telephone set 2 being the sender and the information representing the call state of the telephone set 1 being the caller are registered in a transmission memory 10. A central controller 8 judges the content of the transfer memory 10 for each prescribed period and when the idle state of the telephone set 2 being transfer sender is judged, the transfer sender telephone set 3 and the call signal trunk 5 are connected. Then the connection between the transfer destination telephone set 3 and the call signal trunk 6 is disconnected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a telephone exchange, and more particularly to a telephone exchange that transfers an incoming call to another telephone when the telephone is busy.

[Conventional technology]

When a plurality of telephones are installed in an office or the like, it is a common experience that when one telephone receives a call, that telephone is already busy.

One way to deal with such cases is to equip the telephone exchange with a busy forwarding function, so that if the "transferring source telephone that received the incoming call" is busy, the call will be transferred to the "preset forwarding destination telephone". ” and the incoming call waits for the destination phone to answer.

[Problem to be solved by the invention]

By the way, the above-mentioned conventional busy transfer function has the following drawbacks because after calling the transfer destination telephone, the call simply waits for the transfer destination to respond.

For example, if the transfer destination is unavailable and does not answer, the transfer destination phone will continue to ring forever even if the transfer source phone becomes idle.

■Suppose that immediately after a call is received and a busy transfer connection is established, the transfer source telephone becomes idle. In this case as well, the person who answered the call on the forwarding destination phone had to inquire about the other party's requirements, etc., and then convey the information again to the person using the forwarding phone, resulting in double work. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a telephone exchange that eliminates the above-mentioned drawbacks.

[Failure to solve the problem]

The present invention provides a transfer destination telephone registration means that registers a transfer destination telephone in advance and transfers an incoming call to the transfer destination telephone when an incoming call is received on a busy transfer source telephone; a call monitoring means for monitoring whether or not the transfer source telephone becomes idle during the call monitoring means; The telephone exchange is equipped with re-calling means for re-calling.

By doing this, it will monitor whether the transfer source phone is free or not, and as soon as the transfer source phone becomes free, it will not ring the transfer source phone again, so that It becomes possible to call the telephone. Therefore,
There is no need to waste effort on the person receiving the transfer destination phone.

〔Example〕

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

FIG. 1 is a block diagram schematically showing an embodiment of the present invention. As shown in the figure, a communication path 7 constituting a telephone exchange accommodates a plurality of telephones 1, 2, 3, and a ring trunk 4 and a ring signal trunk 5, 6.
A central control unit 8 is also connected for connecting communication paths between each telephone set and each trunk, and for performing various controls. The central control unit 8 also includes a transfer memo IJ 10 shown in FIG. 2, which is used to sequentially memorize transfer destination information and transfer source information when a call is received. be. Furthermore, the central control unit 8 is configured to pre-register to which telephone the incoming call is to be transferred when a certain telephone receives an incoming call.

The operation of the telephone exchange of the present invention configured as described above will be explained along with the flowcharts shown in FIGS. 3 to 5.

Now, in FIG. 1, assume that telephone 1 makes a call to telephone 2. Then, in the flowchart shown in FIG. 3, a check is made to see if the telephone 2, which is the called telephone, is busy (step 2), and if it is busy, the process moves to the next step 2. In this step (2), it is determined whether the telephone 2, which is the called telephone, is in busy transfer registration. If YES, the process moves to the next step (2), and if NO, no transfer is performed. In step (3), the telephone 3, which is the transfer destination, and the ringing signal trunk 6 are connected via the communication path 7, and the telephone 1, which is the incoming call, and the ringing trunk 4 are also connected.

Next, the process moves to step (2), and the information that the transfer source telephone number 1 or 2 is busy and the information that the incoming call, telephone number 1 is ringing, are stored in the transfer memory shown in FIG. Registered in 10.

What is shown in FIG. 4 is the processing that the central control device 8 performs at regular intervals. In step (2), the contents of the transfer memory 10 are determined, and if the transfer source and incoming call information are registered, the process moves to step (2). Here, the "vacant state of the transfer source telephone 2" is determined, and if the transfer source telephone 2 is free, the process moves to step (3), where the transfer source telephone 2 and the calling signal trunk 5 are connected. At this time, the process differs depending on whether the connection between the transfer destination telephone 3 and the ring signal trunk 6 is disconnected, or whether the connection is left as it is and the telephone that answered first and the incoming call, telephone 1, are used to talk. You may take the following method.

Next, the process moves to step (2), where the information about the transfer source telephone 2 and the information about the incoming call telephone 1 registered in the transfer memory 10 are deleted.

If the "transfer source telephone 2 remains in a busy state", steps (2) and (2) are repeated at regular intervals until it becomes idle.

If the transfer destination phone 3 answers before the transfer source phone 2 becomes idle, as shown in FIG. The call state is established, and then the process moves to step (3), where the information of the transfer source telephone 2 and the information of the incoming call telephone 1 registered in the transfer memory 10 are erased.

〔Effect of the invention〕

As explained above, in the present invention, even when a call is received on a busy telephone and the transfer destination telephone is called by busy transfer, the transfer source telephone becomes idle before the transfer destination telephone answers. When the transfer is made, the transfer source's phone is called. Therefore, if the transfer source telephone becomes free immediately after the busy transfer connection is made, the call will be made, so that the incoming call can be immediately communicated with the intended telephone user.

In addition, even if the transfer destination phone is unanswered because the user is not present, if the transfer source that is busy (the user is always present since they are using a phone) becomes empty someday, It becomes possible to make a call and make a reliable call.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a telephone exchange according to an embodiment of the present invention, FIG. 2 is a block diagram of a transfer memory for storing necessary information used in the telephone exchange according to an embodiment of the present invention, and FIG. 3
5 to 5 are flowcharts showing the operation of one embodiment of the present invention. 1.2.3... Telephone, 4... Ringing trunk, 5.6... Ringing signal trunk, 7...
...Call path, 8...Central control unit, 10...
...Transfer memory.

Claims (1)

[Claims] Transfer destination telephone registration means for registering a transfer destination telephone in advance and transferring an incoming call to the transfer destination telephone when an incoming call is received on a busy transfer source telephone; a call monitoring means for monitoring whether or not the transfer source telephone becomes idle during the call; and if the transfer source telephone becomes idle during the call from the call monitor to the transfer destination telephone; A telephone exchange characterized by comprising a re-calling means for re-calling the transfer source telephone.