JPH01200862A - System for transferring absence - Google Patents

Abstract

PURPOSE:To cancel the absence transfer registration of an extension to be called even when the response of the extension to be called is not executed, and to prevent a subscriber from being troubled with an unnecessary transfer by executing a transmission from a registering extension to the extension to be called and cancelling the absence transfer registration of the said extension to be called. CONSTITUTION:When the off-hook of a telephone A is detected by an extension circuit LC 6, a transition to a figure receiving condition is executed, and the telephone A is connected to a figure receiving part ORT 5. An extension number dialed from the telephone A is received by the ORT 5, and it is analyzed by a control part CC 1. When a transferring destination telephone C at the time of an absence is registered in the area of a transfer memory TRMEM 2, the telephone A and telephone C are compared, and when they coincide, the absence transfer registration of a telephone B is canceled, the telephone B and a ringing sending trunk IR 4 are connected, and the telephone B is called. Simultaneously, the telephone A and a ringing tone sending trunk RBT 3 are connected, and ringing tone is sent to the telephone A. When the telephone B is busy, the absence transfer registration of the telephone B is canceled, and busy processings are executed to the telephones A and B. At the time of a non-coincidence, the telephone C and the IR 4 are connected, the telephone C is called, simultaneously, the telephone A and the RBT 3 are connected, and the ringing tone is sent to the telephone A.

Description

[Detailed description of the invention] (b) Industrial application field The present invention is inspired by a call forwarding system in a private branch exchange.

(ψ Conventional technology) Traditionally, private branch exchanges have been equipped with a call forwarding function.
If a forwarding destination extension (registered extension) in case of absence is registered in advance, this registered extension is called, and when the registered extension answers, a call between the calling extension and the registered extension is started.

To receive this service, you need to enter the special number and forwarding destination (registered extension) from the called extension, and to cancel this service, you need to enter the special number from the called extension. be.

In the conventional call forwarding method described above, if the called extension forgets to cancel the call forwarding registration, even though incoming calls to the called extension will continue to be forwarded to the registered extension, the call forwarding is canceled from the registered extension. The means did not exist. Therefore,
Even when there is no subscriber of the called extension on the registered extension, incoming calls to the called extension are forwarded to the registered extension, and the subscriber of the registered extension has to take unnecessary actions.

Therefore, Japanese Patent Application Laid-Open No. 61-208955 discloses a call forwarding system that allows a call to be made from a registered extension to a called extension, and can notify the called extension that the user has forgotten to cancel the call forwarding registration.

(/c) Problems that the invention seeks to solveHowever,
Even with the technology described in the above-mentioned Japanese Patent Application Laid-Open No. 61-208955, if there is no response from the called extension, it is not possible to communicate that the call forwarding registration has been canceled, and the incoming call to the called extension continues to be sent to the registered extension. There is a problem with being forwarded.

The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a call forwarding system that can cancel call forwarding even if there is no response from the called extension.

B.) Means for Solving the Problems The present invention provides a call forwarding method in which a called extension calls a registered extension that has been registered in advance, and when a call is made from the registered extension to the called extension, the called extension is absent. This is a missed call forwarding method characterized by canceling forwarding registration.

(B) Function According to the present invention, the call forwarding registration of the called extension can be canceled by making a call from the registered extension to the called extension, so even if there is no response from the called extension, the call forwarding registration of the called extension can be canceled. can be canceled.

(C) Embodiment FIG. 1 is a block diagram of a private branch exchange for explaining an embodiment of the present invention.

(Fig.) Here, (1) is the control section (CC) that controls each section.
), (2+ is the transfer memory (TRMEM) in which the extension number of the transfer destination is stored, (31 is the ring tone transmission trunk (RBT) to notify the calling extension that the extension is ringing, (
4) is the ringing outgoing trunk (IR), (51 is the digit culture section (ORT) that receives the dialed digits, (6)
1 is an extension circuit (LC) that detects on-hook and off-hook.
).

First, in such an exchange, for example, telephone (B) (
The operation when setting the call forwarding service using the called extension will be explained.

When the off-hook of the telephone (B) is detected by the LC (6), the telephone (B) and 0RT (5) are connected, and the special number indicating call forwarding registration dialed from the telephone (B) and the extension number of the forwarding destination are received. and stores the extension number in the area corresponding to TRMEM (2+ telephone (B)).

Next, referring to FIG. 2, a description will be given of a missed call forwarding system according to an embodiment of the present invention set as described above.

When the off-hook of telephone (A) (calling extension) is detected from LC+61, step (S), which is in an idle state, is detected.

) to step (Sl), which is in the digit reception state, and connects the telephone (A) to 0RT (51). In this step (Sl), the extension number dialed from the telephone (A) is transferred to 0RT (51). It is received and analyzed by CC (1). At this time, TRMEM (
In the area of 21, call forwarding number in case of absence (C) (registered extension)
If it is registered, the process moves to step (S2).

In step (S2), phone (A) and phone (C) are compared, and if the phone (A) and phone (C) match, go to Ste Knob (S3), and if they do not match, go to step (S4). Transition.

In step (S3), call forwarding registration of telephone (B) is canceled, telephone (B) and IR (41) are connected, and telephone (B) is
), connects telephone (A) and RBT (3), and sends a ring tone to telephone (A).

At this time, if the phone (B) is busy, the phone (B)
) and apply normal busy processing to telephones (A) and (B).

Further, in step (S4), the telephone (C) and the IR (
41, call the telephone (C), and call the telephone (A).
) and RBT (31) and sends a ring tone to telephone (A). That is, step (S4) is a normal call transfer.

In addition, in the above-mentioned embodiment, in step (S6),
At the same time as canceling the call forwarding registration for phone (B),
A) was configured to call, but without calling phone (A),
It is also possible to cancel the call forwarding registration of telephone (B).

(G) Effects of the Invention As is clear from the above description, the present invention allows the call forwarding registration of the called extension to be canceled by making a call from the registered extension to the called extension. Users will not be bothered by unnecessary transfers.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a private branch exchange for explaining one embodiment of the present invention, and FIG. 2 is a state transition diagram for explaining one embodiment of the present invention. (1)...control unit (CC), (2+...transfer memory (TRMEM), +31...ringing tone transmission trunk (R
BT), (41...Ringing transmission trunk (IR)
, (5)... Number receiving section (ORT), (6)... Extension circuit (LC).

Claims (1)

[Claims] (1) In a call forwarding method in which a called extension calls a registered extension registered in advance, when a call is made from the registered extension to the called extension, the call forwarding registration of the called extension is canceled. Call forwarding method.