JPH05260191A - Absence transfer system - Google Patents

Abstract

PURPOSE:To constitute the system so that a transfer to an absence transfer destination of an incoming call can be limited to a specific calling subscriber. CONSTITUTION:An absence transfer registration memory 71 stores absence transfer registration presence information, absence transfer destination subscriber information, and calling subscriber information for enabling a transfer to an absence transfer destination so as to correspond to each subscriber. At the time of calling, a central controller 7 discriminates a fact that an absence transfer in registered already, and thereafter, discriminates whether the subscriber is a calling subscriber to whom a transfer is enabled or not, and at the time of transfer enable, an incoming call is transferred to a transfer destination subscriber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unattended transfer system, and more particularly to an unattended transfer system in a stored program controlled automatic exchange.

[0002]

2. Description of the Related Art Conventionally, in this type of call forwarding system, for example, until the call forwarding service is registered from an extension subscriber or a maintenance device and a registration cancellation operation is performed after the registration operation, the call to the extension subscriber is not accepted. It was always transferred to the registered transfer destination.

[0003]

In the conventional call forwarding system described above, all incoming calls to extension subscribers who have registered a call forwarding service are forwarded to the call forwarding destination, and when a plurality of persons share a telephone set. However, the incoming call to the telephone that registered the call forwarding service is automatically rejected. For example, there is a drawback that it is not possible to select not to forward incoming calls from emergency and important extension subscribers to the call forwarding destination but not forwarding calls that are not urgent and incoming calls to other staff.

An object of the present invention is to provide a call forwarding system in which only desired incoming calls can be forwarded.

[0005]

According to the call forwarding system of the present invention, in a private branch exchange of a storage program control system, means for storing presence / absence of call forwarding registration corresponding to each subscriber based on dial information from the subscriber. And a means for storing the accommodating position of the absent transfer destination subscriber, and a means for storing at the accommodating position of the calling subscriber who is permitted to transfer the incoming call to the absent-forward transfer registered subscriber. When transfer registration has been completed and the incoming call is an incoming call from the forwarding-permitted calling subscriber, the incoming call is forwarded to the absent forwarding destination subscriber.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a memory block diagram showing an example of contents of the absent-transfer registration memory 71 of FIG.

The automatic exchange is composed of line circuits 4-1 and 4-
A call path switch 5 for accommodating extension subscribers 1, 2, and 3 via 2, 4-3, and line circuits 4-1 to 4-1 via a bus 6.
The central control unit 7 is connected to the communication path switch 5 and 4-3 and controls all sequence control in the exchange. The central control unit 7 uses the sequence control program 7
0, as shown in FIG. 2, corresponding to each of the extension subscribers 1, 2 and 3, information regarding presence / absence of registration of absent call transfer, accommodating position information of the speech path switch 5 of the extension subscriber of the absent transfer destination, and the absence transfer destination. Call switch 5 of the calling extension subscriber that permits transfer of the call
An absence transfer registration memory 71 for storing the above accommodation position information is provided.

Here, the operation of the present embodiment will be described with the extension subscriber 1 as a call forwarding extension subscriber, the extension subscriber 2 as a call forwarding destination extension subscriber, and the extension subscriber 3 as a calling extension subscriber.

When extension subscriber 1 goes off-hook and dials a predetermined call forwarding registration number, then extension subscriber 2's extension subscriber number is dialed, the dialed data is transmitted in a known manner as shown in FIG. The absent transfer destination is registered in the area corresponding to the extension subscriber 1 of the absent transfer registration memory 71 shown in FIG. Further, when the extension subscriber 1 dials the calling extension subscriber number which permits the transfer to the absent transfer destination, the extension is transferred to the area corresponding to the extension subscriber 1 of the absence transfer registration memory 71 shown in FIG. The calling extension subscriber who permits the call is registered. That is, "absent transfer registration exists", the accommodation position of the absent transfer destination extension subscriber 2, and the accommodation position of the calling extension subscriber 3 who permits the transfer to the absent transfer destination are stored in the extension subscriber corresponding area of the absent transfer registration memory M71. It is stored and used for subsequent processing by the central controller 7.

In this state, when the extension subscriber 3 dials the extension subscriber number of the extension subscriber 1, the central control unit 7 executes the program 70 to select "External subscriber 1" from the area for registering the absence transfer registration memory 7. Absent transfer "and extension 2
The accommodating position 2 of the extension subscriber 3 is known, and whether the accommodating position of the extension subscriber 3 is registered is identified. When the central control device 7 identifies that the accommodation position of the extension subscriber 3 is registered, the line circuit 4-3 to the speech path switch 5 to the line circuit 4-2 are detected.
The normal call forwarding connection is made.
When the extension subscriber 1 is not registered as an absent transfer registration, the central control unit 7 reads "absence transfer registration not present" from the absence transfer registration memory 71, or reads "absent transfer registration available" as " When "No extension subscriber who permits transfer to absent destination" is read, the normal extension interconnection between the extension subscriber 3 and the extension subscriber 1 is performed.

[0011]

As described above, according to the present invention, the presence / absence of registration of absence transfer registration, the information of the absence transfer destination subscriber stored for each subscriber, and the calling extension subscriber information permitting the transfer to the absence transfer destination are stored. Since the transfer of the incoming call can be selected, there is an effect that only the incoming call desired by the subscriber can be transferred.

[Brief description of drawings]

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

FIG. 2 is a memory configuration diagram showing an example of the absence transfer registration memory of FIG.

[Explanation of symbols]

 1 to 3 extension subscribers 4-1 to 4-3 line circuit 5 speech path switch 6 bus 7 central controller 10 sequence control program 71 call forwarding registration memory

Claims (1)

[Claims] 1. In a private branch exchange of the stored program control system, means for storing presence / absence of registration of absent-call transfer corresponding to each subscriber from dial information from the subscriber, and storage location of absent-transfer destination subscriber. And a means for storing the accommodating position of the calling subscriber who is permitted to transfer the incoming call to the call forwarding registration subscriber, and the call forwarding is permitted when the call forwarding is registered when the call is received. A call forwarding method, wherein when the call is an incoming call from a calling subscriber, the call is forwarded to the call forwarding destination subscriber.