JPH04337953A - Absent transfer system - Google Patents

Abstract

PURPOSE:To specify an incoming call to be transferred and to limit an emergency or important call by registering a caller number desiring transfer in advance among incoming calls under setting the absent transfer, collating the caller number with the previously registered caller number desiring the transfer when a call is incoming, and transferring only the coincident incoming call to a designated transfer destination. CONSTITUTION:A central processing unit (CPU) 6 stores the caller number permitting the absent transfer transmitted by operating an extension telephone set or a board 1 in an absent transfer permitting number storage circuit 9 for each extension. The CPU 6 stores the caller number informed in the case of terminating the call from an ISDN network in a caller number storage circuit 7. A collation circuit 8 collates the caller number of the incoming call stored in the caller number storage circuit 7 with the transfer permitting number stored in the absent transfer permitting number storage circuit 9 beforehand. Only when the collated result of the collation circuit 8 shows coincidence, the CPU 6 connects an ISDN network subscriber 5 through a speech path switch 4 to a transfer destination extension subscriber 2.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a call forwarding system for subscribers in electronic automatic switching equipment.

0002

2. Description of the Related Art Conventionally, in this type of call forwarding system, when an incoming call is received on an extension set for call forwarding, all the incoming calls are forwarded to the forwarding destination extension.

0003

[Problem to be Solved by the Invention] In this conventional call forwarding system, when a call arrives on an extension set for call forwarding,
Since all of the incoming calls are transferred to the forwarding destination, there is a drawback that it is not possible to specify which incoming calls are to be forwarded.

SUMMARY OF THE INVENTION An object of the present invention is to provide a call forwarding method that specifies a call to be forwarded from a call that is being set for call forwarding.

[0005]

[Means for Solving the Problems] The absentee call forwarding method of the present invention is a missed call forwarding method in an electronic automatic switching device.
a first memory that registers and stores a calling number for each extension that permits call forwarding by operation from an extension telephone or an attendant console; a second memory that stores a calling number notified from an ISDN network; It has means for comparing the caller number stored in the second memory with the call forwarding permission number registered in the first memory, and permits call forwarding only if they match as a result of the check.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a relay system diagram showing an embodiment of the present invention, in which there is a call forwarding permission number storage circuit 9 in which a caller number for which incoming call transfer is permitted is registered in advance, and an incoming call originating circuit 9. A calling number storage circuit 7 that temporarily stores a call number, and a verification circuit that compares the calling number in the calling number storage circuit 7 with the calling number in the missed call transfer permission number storage circuit 9 to permit transfer. 8, and further includes an announcement machine 3 that sends out a predetermined message when transfer is not permitted as a result of verification.

[0008] When the extension subscriber 1 who has set up call forwarding wants to permit the forwarding of only some incoming calls during the call forwarding setting, he or she previously stores the caller number to which forwarding is desired in the call forwarding permission number storage circuit 9 in a predetermined manner. Register it. In this state, when extension subscriber 1 who has set call forwarding sets call forwarding, he lifts the handset and confirms the dial tone, then dials the special number for call forwarding setting and the extension number of extension subscriber 2 who is the forwarding destination. The central processing unit 6 stores that call forwarding setting extension subscriber 1 has set call forwarding for extension subscriber 2.

Next, when a calling party number notification is received from the ISDN network subscriber 5, the central processing unit 6 detects this and sends the calling party number sent from the ISDN network to the calling party. A verification circuit 8 verifies whether or not the calling party number temporarily stored in the number storage circuit 7 and subsequently received is registered in the previously registered missed transfer permission number storage circuit 9.

As a result of the verification, if the received calling party number is registered for call forwarding, the central processing unit 6 connects the incoming call to the forwarding destination extension subscriber 2 through the call path switch 4. If the received calling number is not registered for call forwarding permission, the announcement machine 3 sends an announcement to the effect that the call forwarding setting subscriber 1 is absent through the call path switch 4.
An announcement is made to ISDN network subscribers 5.

[0011] When the extension subscriber 1 who has set call forwarding returns to his or her desk and performs a predetermined deregistration operation, call forwarding is automatically canceled.

0012

[Effects of the Invention] As explained above, the present invention registers in advance the calling number of an incoming call that is set to be forwarded, and registers it in advance as the calling party number at the time of incoming call. It checks the caller number of the person requesting a certain forwarding, and only those incoming calls that match are forwarded to the designated forwarding destination, making it possible to identify the incoming calls to be forwarded and limiting the number to urgent or important calls. It has the effect of being able to.

[Brief explanation of drawings]

FIG. 1 is a relay system diagram showing an embodiment of the present invention.

[Explanation of symbols]

1. Extension subscriber (at your desk) 2 Extension subscriber (forwarding destination) 3 Announcement machine 4　　　　　Call path switch 5 ISDN network subscribers 6 Central processing unit 7 Caller number storage circuit 8 Verification circuit 9. Absent transfer permission number storage circuit

Claims (1)

[Claims] Claim 1: In a call forwarding system in an electronic automatic switching system, a first memory that registers and stores a calling number for each extension to permit call forwarding by operation from an extension telephone or a relay stand; A second memory for storing the notified calling number, and means for comparing the calling number stored in the second memory with the call forwarding permission number registered in the first memory. A call forwarding method is characterized in that call forwarding is permitted only when a match is found as a result of verification.