JP2000022831A - Transfer connection system/method and transfer connection program recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize transfer connection without depending on an incoming call side. SOLUTION: A table 10 showing the corresponding relation between a reason display value and transfer destination information is provided for a calling side private exchange. The table 10 is referred to based on the reason display value in a cut message transmitted since an opposite party is busy, and a transfer destination is detected. At the time of recalling, detected transfer destination information is set as opposite party information so as to realize transfer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a transfer connection system,
The present invention relates to a transfer medium storing a transfer connection method and a transfer connection program, and particularly to a private branch exchange (PBX: Private).
Branch Exchange), ISDN
(Integrated Services Digi
The present invention relates to a transfer connection system, a transfer connection method, and a recording medium that stores a transfer connection method using a cause indication in a disconnection message from a game in a system accommodated in a network (tal Network) network form.

[0002]

2. Description of the Related Art In a conventional transfer service between ISDN networks, a transfer is generally connected to a predetermined extension subscriber in a local station or a subscriber accommodated in a counter station in a terminating private branch exchange. It is a target.

In order to realize this transfer service, in a conventional private branch exchange, the transfer destination is determined in advance on the receiving side, and the transfer destination is determined based on the information.
Therefore, if the switching equipment on the receiving side does not have a transfer function, the transfer service cannot be realized.

[0004]

As described above, a transfer service cannot be realized if the switching equipment on the receiving side does not have a function for transferring. Further, when the subscriber of the partner station is busy or when the device is not connected, it is necessary to change the transfer destination. In this case, it is necessary to improve the transfer service by determining the transfer destination in the switching equipment on the transmission side by taking into account the conditions of the other party. Therefore, realization of a transfer connection system with further improved transfer service has been desired.

[0005] Japanese Patent Application Laid-Open No. Hei 5-244309 discloses that
This is to detect a failure such as a line abnormality using the reason display information received from the ISDN network, and cannot solve the above-mentioned problem. Japanese Patent Application Laid-Open No. 5-95431 discloses that when a call is released, an ISD is generated based on the number of incoming and outgoing calls.
This method counts the number of occurrences of each of the reason display types of the reason display information received from the N network or the partner station and totals the reason display information, and cannot solve the above-described problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks of the prior art, and has as its object the purpose of making it possible for a call originating private branch exchange not to provide a transfer service in a destination private branch exchange. To provide a transfer connection system, a transfer connection method, and a transfer connection program capable of transferring a destination to another subscriber or a subscriber accommodated in another station according to a subscriber condition (reason display information at disconnection). It is.

[0007]

SUMMARY OF THE INVENTION A transfer connection system according to the present invention transfers a call to another subscriber based on a call disconnection message sent from a terminating exchange which performs a switching process for a destination subscriber. It is characterized by including transfer connection means.

[0008] The transfer connection method according to the present invention includes a transfer connection step of transferring a call to another subscriber based on a call disconnection message sent from a terminating exchange performing a switching process for a destination subscriber. It is characterized by.

[0009] The recording medium storing the transfer connection program according to the present invention allows a computer to transfer a call to another subscriber based on a call disconnection message sent from a terminating exchange performing a switching process for a destination subscriber. A program for functioning as transfer connection means for performing

In short, in this transfer connection system, the reason display value is detected for the originating private branch exchange, the destination transfer information of the transfer destination is read from the detected reason display value, and the call is re-transmitted based on the transfer information. It is. By doing so, the transfer service is realized by the originating private branch exchange, and there is no need to prepare a function for performing the transfer service on the called side.

[0011]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings referred to in the following description, the same reference numerals are given to the same parts as those in the other drawings.

FIG. 2 is a block diagram showing an embodiment of the transfer connection system according to the present invention. In the figure,
Via the ISDN I, the subscriber STA-A transmits the outgoing private branch exchange PBX-A, the subscriber STA-B transmits the incoming private branch exchange PBX-B, and the subscriber STA-C transmits the destination private branch exchange PBX-C. It is configured to be connected by using each of them. The originating private branch exchange PBX-A is provided with a switch SW-A.
And an exchange controller CC-A for controlling the same, ISDN
It is configured to include a line trunk PRT-A and an ISDN terminal interface ILC-A. Also, the terminating private branch exchange PBX-B includes a switch SW-B, a switching controller CC-B for controlling the switch SW-B, an ISDN line trunk PRT-B, and an ISDN terminal interface ILC-B.
B. Furthermore, the transfer destination private branch exchange PBX-C also includes a switch SW-C, a switching control device CC-A for controlling the switch SW-C, and an ISDN line trunk PRT-C.
C and an ISDN terminal interface ILC-C.

[0013] Now, the extension subscriber STA-A accommodated in the originating private branch exchange PBX-A is called the private branch exchange PB.
When calling the extension subscriber STA-B accommodated in the X-B, the subscriber STA-A and the subscriber S are switched by the exchange PBX-A and the exchange PBX-B via the ISDN I.
TA-B is connected. However, the private branch exchange PBX-
When the extension subscriber STA-B accommodated in B is busy, the private branch exchange PBX-B transmits the cause information via the ISDN I. In this case, the exchange PBX-B
The reason display information is transferred to the private branch exchange PBX-A on the originating side as a reason display which is an information element in the disconnection message.

The reason indication is an information element of the disconnection message (disconnection / release / release complete), and is a well-known ISDN.
Defined in protocol Q931.

The private branch exchange PBX-A on the originating side transmits the received disconnection message to the ISDN line trunk PRT.
-A to the switching control device CC-A. The switching control device CC-A reads the reason indication included in the information element in the disconnection message. Further, the exchange control device CC-A reads out the transfer destination information corresponding to the transfer destination information for each reason indication registered in a memory (not shown) provided therein.

Further, the switching control device CC-A creates call setting information for calling the other party in order to perform retransmission. When the called number information element is created, the transfer destination information detailed data described in the transfer destination information is read from a not-shown called number information element memory and added to the call setting information. Then, a retransmission connection is made to the private branch exchange PBX-C via the ISDN line trunk PRT-A.
By doing so, the transfer connection can be performed for each reason display value.

Further description will be made with reference to FIG. Referring to the figure, in the originating private branch exchange PBX-A,
When notified via the SDN network I, the value of the cause information is detected. Based on the detected reason display information value, transfer destination information for each reason display value is extracted from the table 10 in FIG.

When retransmission is performed, the extracted transfer destination information is used as the destination number. As shown in FIG. 1, the transfer destination information detailed data (ISDN called number information element) 20 includes a called number information element identifier (octet 1),
Called number content length (octet 2), number type and numbering plan identification (octet 3) and number digit (octet 4)
From the following).

Next, the operation of the present system will be described in more detail with reference to FIGS. The extension subscriber STA-A accommodated in the originating private branch exchange PBX-A is:
ISDN terminal interface ILC-A, switch SW
-A and ISDN line trunk PRT-A
A transmission process is performed for the DN network I.

In the private branch exchange PBX-B on the receiving side,
An incoming connection is made via the ISDN network I, and a connection request is made to the switching controller CC-B via the ISDN line trunk PRT-B. If the subscriber STA-B is busy, it sends a disconnect message via the ISDN line trunk PRT-B. At this time, a busy value is set to the reason display information element defined in the disconnection message and the transfer is performed.

This disconnection message is sent to the switching controller CC-A of the private branch exchange PBX-A via the ISDN network I and further via the ISDN line trunk PRT-A. The switching control device CC-A extracts the reason indication value included in the notified disconnection message, and transfers the destination information corresponding to the reason indication value from the destination information for each reason indication value shown in FIG. Derive. Here, in the exchange control device CC-A, a table 10 indicating the correspondence between the reason display values (“0” to “n”) and the transfer destination information as shown in FIG. 1 is prepared in advance. Then, this table 10 is stored in a memory (not shown) in the exchange control device CC-A. The contents of the table 10 can be freely rewritten and changed from the outside, and the transfer destination can be easily changed by rewriting.

Further, in the switching control device CC-A, when there is transfer destination information, a call setup message for performing a retransmission to the private branch exchange PBX-C when executing the retransmission process for the ISDN network I. Create At this time, when creating a called number, which is connection destination information of the other party, a called number information element, which is transfer destination information extracted from the reason display value, is set as a called number in the call setting. The switching controller CC-A further transmits the edited call setup information to the ISDN line trunk P.
Send to RT-A. In the ISDN I, as indicated by the arrow Y, the private branch exchange PBX-
C is connected to the extension subscriber STA-C via the switch SW-C and the ISDN terminal interface ILC-C via the ISDN line trunk PRT-C accommodated in C. Service is realized.

As described above, in the present system, since the transfer processing is performed on the calling side, there is no need to perform the transfer processing on the called side. Since the transfer destination can be finely selected in the condition of the receiving side, the transfer destination can be selected for each reason display. For example, if the other party is busy, the call is forwarded to the subscriber STA-C, and if the other party is restricted, the call is forwarded to another subscriber (not shown) (for example, the subscriber STA-D). The appropriate transfer can be performed according to the.

In short, the originating private branch exchange is provided with a table indicating the correspondence between the reason display value and the transfer destination information. Then, the transfer destination is detected by referring to this table based on the reason display value in the disconnection message transmitted when the other party is busy. When retransmission is performed, the detected transfer destination information is used as destination information. By doing this,
The transfer for each reason display value is realized. As described above, in the present system, a transfer connection method for transferring a call to another subscriber based on a call disconnection message sent from a receiving side exchange performing a switching process for a destination subscriber is performed. It is.

FIG. 3 shows the transfer processing in this system.
This will be described with reference to the flowchart of FIG. The operation of the originating private branch exchange is shown in FIG. As shown in the figure, the originating private branch exchange monitors whether a disconnection message has been transmitted from the destination private branch exchange (step S31). When the disconnection message is transmitted, the transfer destination is detected by referring to the above-described table based on the reason display value in the disconnection message (step S3).
2). Then, the transfer is performed to the detected transfer destination (step S33).

It is to be noted that the same transfer processing as described above can be performed by preparing a recording medium on which a program for realizing the above-described transfer processing is recorded and controlling each unit of the originating exchange by using the recording medium. Is obvious. The recording medium includes a semiconductor memory not shown in each of the above drawings,
Various recording media other than the magnetic disk device can be used.

The present invention can take the following aspects in connection with the description of the claims.

(1) The call disconnection message is an ISDN
The transfer connection system according to any one of claims 1 to 4, wherein the data is transmitted from a destination on a network via the network.

(2) The transfer connection system according to any one of claims 1 to 4, wherein the transfer connection means is provided in a private branch exchange of a transmission source.

(3) The call disconnection message is an ISDN
The transfer connection method according to any one of claims 5 to 8, wherein the transmission is performed from a destination in a network via the network.

(4) The call disconnection message is an ISDN
The recording medium according to any one of claims 9 to 12, wherein the recording medium is transmitted from a destination on a network via a network.

[0032]

As described above, according to the present invention, by performing the transfer under the control of the transmitting side, there is an effect that it is not necessary to perform the transfer control on the receiving side. Further, by specifying the transfer destination in detail according to the condition of the receiving side, there is an effect that the transfer destination can be selected for each reason display value.

[Brief description of the drawings]

FIG. 1 is a diagram showing a relationship between a reason display value and transfer destination information in the transfer connection system of FIG. 2;

FIG. 2 is a block diagram showing a configuration of a transfer connection system according to an embodiment of the present invention.

FIG. 3 is a flowchart illustrating an operation of the transfer connection system according to the embodiment of the present invention;

[Explanation of symbols]

10 Table 20 Transfer destination information detailed data CC-A, CC-B, CC-C exchange controller ILC-A, ILC-B, ILC-C ISDN terminal interface PBX-A, PBX-B, PBX-C Private branch exchange PRT -A, PRT-B, PRT-C ISDN line trunk STA-A, STA-B, STA-C Subscriber SW-A, SW-B, SW-C Switch

Claims (12)

[Claims] 1. A transfer connection, comprising: transfer connection means for transferring a call to another subscriber based on a call disconnection message sent from a destination exchange for performing a switching process for a destination subscriber. system. 2. The transfer connection system according to claim 1, wherein said transfer connection means transfers the call to a subscriber corresponding to a reason indication value indicating a reason why the call was disconnected. 3. The transfer connection means includes a table indicating a correspondence relationship between each of a plurality of types of cause display values and information indicating a transfer destination subscriber, and determines a call transfer destination subscriber according to the contents of the table. The transfer connection system according to claim 1, wherein the transfer connection system is determined. 4. The table according to claim 1, wherein a correspondence relationship between each of the plurality of types of reason display values and information indicating the transfer destination subscriber is freely changeable from outside.
The transfer connection system according to any one of the above. 5. A transfer connection step for transferring a call to another subscriber based on a call disconnection message sent from a receiving side exchange for performing a switching process for a destination subscriber. Method. 6. The transfer connection method according to claim 5, wherein in the transfer connection step, a call is transferred to a subscriber corresponding to a reason indication value indicating a reason why the call was disconnected. 7. The transfer connection step includes a table indicating a correspondence relationship between each of a plurality of types of cause display values and information indicating a transfer destination subscriber, wherein a call transfer destination subscriber is determined according to the contents of the table. The transfer connection method according to claim 5, wherein the transfer connection method is determined. 8. The table according to claim 5, wherein a correspondence relationship between each of said plurality of types of cause display values and information indicating said transfer destination subscriber is freely changeable from outside.
Transfer connection method according to any of the above. 9. A program for causing a computer to function as transfer connection means for transferring a call to another subscriber based on a call disconnection message sent from a destination exchange which performs a switching process for a destination subscriber. A recording medium on which is recorded. 10. The recording medium according to claim 9, wherein said transfer connection means transfers a call to a subscriber corresponding to a reason display value indicating a reason why the call was disconnected. 11. The transfer connection means includes a table indicating a correspondence relationship between each of a plurality of types of cause display values and information indicating a transfer destination subscriber, and determines a call transfer destination subscriber according to the contents of the table. 10. The method according to claim 9, wherein the determination is made.
0 recording medium. 12. The table according to claim 9, wherein a correspondence relationship between each of the plurality of types of cause display values and information indicating the transfer destination subscriber is freely changeable from outside.
12. The recording medium according to any one of 11.