JPH0698040A - Call originating party switching system - Google Patents

Abstract

PURPOSE:To provide a switching function at low cost by providing an automatic connection control part for controlling an originating call by reading information from an address storage part in the case of originating a call from a terminal and connecting the call. CONSTITUTION:When any call comes in on the side of a terminal 1, a communication control part 5 fetches the call originating terminal address of this incoming call from the incoming call signal and reports the information to an address storage part 6. The address storage part 6 stores and manages the information. Then, an auxiliary system host computer 4 originates/disconnects the call to the terminal so as to store the address of the auxiliary system host computer 4 in the address storage part 6. Next, when a work application 7 requires host connection, the job application 7 instructs the host connection to an automatic connection control part 8, and the automatic connection control part 8 possesses the address of the host computer stored in the address storage part 6 from this address storage part 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a call destination switching method in a data exchange network, and more particularly, it automatically determines the host connection address on the terminal side when the terminal is provided with services by the host computers of the active system and the standby system. The present invention relates to a calling party switching method for switching to.

[0002]

2. Description of the Related Art Conventionally, in a business form in which a terminal makes a call connection to a host computer to receive a host service, the terminal is disconnected when the active host computer fails and the terminal connects to the standby host computer or when the failure is restored. When returning, the first method of manually resetting the address to be connected to the host computer in the terminal, or providing a physical line switching device on the host computer accommodation line side of the network to switch the connection destination host computer The second method was used.

[0003]

However, in the first method of manually switching, there is an inconvenience that the user on the terminal side needs to be aware that the host computer has been switched, and a line switching device is installed. Two
However, the method has a problem that the cost is heavy.

[0004]

A call destination switching system according to the present invention comprises an active host computer, a standby host computer for backing up its function when the host computer has a failure, and the active host, In a call destination switching method in a data exchange network accommodating a plurality of terminals for accessing a standby host computer, when a call is made to the terminal, the call always included in the call signal is received. An address storage unit that stores terminal address information and an automatic connection control unit that reads out information from the address storage unit and controls call origination when a call is made from the terminal to establish a call connection are provided to the terminal. This terminal connects to the host computer by calling / disconnecting to / from the terminal, which provides the terminal. And switches the host computer addresses.

Further, when the fault of the faulty host computer is restored, the automatic connection control unit issues a call / disconnect from the restored host computer to the terminal which is the target of the switchback, and thereby the host computer address. Is switched back to the original host computer, and the address storage unit and the automatic connection control unit are each a software module.

[0006]

The present invention will be described below with reference to the drawings. FIG. 1A is a network configuration diagram of a host computer and a terminal showing an embodiment of the present invention, and FIG. 1B is a block diagram showing an example of the terminal in FIG. 1A.

In FIG. 1A, terminals 11, 12, ...
1n is connected to the active host computer 3 and the standby host computer 4 via the data exchange network 2. Normally, the terminals 11 to 1n make a call connection to the active host computer 3 and are provided with business services from the active host computer 3. However, when the active host computer 3 fails, the standby host computer 4 operates as the active host computer 4. It provides services to 11 to 1n on behalf of the host computer 3.

If the active host computer 3 fails, the standby host computer 4 controls the terminals 11, 1 to 1n that need to be switched one after another under the control of the host-side operator. Making / disconnecting calls. At this time, if the terminal address list to be switched is managed in advance in the host computer,
It is possible to reduce the trouble of the operator when switching.

Next, the operation of changing the host computer connection address in the terminal when a call is made / disconnected to the terminal will be described.

In FIG. 1B, when the communication control unit 5 on the side of the terminal 1 receives an incoming call, it takes in the calling terminal address of the incoming call from the incoming call signal and notifies the address storage unit 6 of the information. To do. The address storage unit 6 stores and manages the information. Standby system host computer 4 in FIG.
By calling / disconnecting the terminal, the address of the standby host computer 4 is stored in the address storage unit 6 of FIG. 1 (B). In this embodiment, the address storage unit 6 is realized as a software module. Next, when the business application 7 needs a host connection, the business application 7 instructs the automatic connection control unit 8 to connect to the host, and the automatic connection control unit 8 stores the address storage unit 6 in the address storage unit 6. Get the address of the host computer The address of this host computer is the address of the host computer that the terminal last called. In this embodiment, the automatic connection control unit 8 is also realized by a software module. The automatic connection control unit 8 gives a connection instruction to the communication control unit 5 together with the address of the host computer obtained from the address storage unit 6. The communication control unit 5 makes a call to the address of this host computer, that is, to the last standby host computer 4 that has received the call.

As described above, in this embodiment, the host computer of the connection destination can be automatically switched from the active host computer 3 to the standby host computer 4 without human intervention from the terminal.

Next, when the fault is restored and the host computer is switched back, the restored host computer makes a call / disconnect to the terminal to be switched back, so that the terminal is connected to the original host computer again. Will be possible.

[0013]

As described above, according to the present invention, when a terminal device receives an incoming call to this terminal device in a data exchange network in which the terminals are provided with services by the host computers of the active system and the standby system. An address storage unit that always stores the calling terminal address information included in the incoming call signal, and an automatic connection that controls the calling by reading the information from the address storage unit when making a call connection from the terminal By providing the control unit, the automatic call from the terminal can be changed to the switching destination host computer only by calling / disconnecting the switching destination host computer, so that these functions are not bothered by the terminal user. Can be realized by simple software in the host and the terminal device, and the switching function can be realized at low cost.

[Brief description of drawings]

1A is a network configuration diagram of a host computer and a terminal showing an embodiment of the present invention, and FIG. 1B is a block diagram showing an example of the terminal in FIG. 1A.

[Explanation of symbols]

 1, 11, 12, 1n terminals 2 data exchange network 3 working host computer 4 standby host computer 5 communication control unit 6 address storage unit 7 business application 8 automatic connection control unit

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI Technical display section H04L 29/14

Claims (3)

[Claims] 1. Data accommodating an active host computer, a standby host computer for backing up its function when a failure occurs, and a plurality of terminals for accessing the active and standby host computers. In the calling party switching method in the switching network, when an incoming call is made to the terminal, an address storage unit that always stores the calling terminal address information included in the incoming call signal, and a call sent from the terminal. An automatic connection control unit that reads out information from the address storage unit and controls call origination when making a call connection is provided, and the host computer that provides a service to the terminal originates / disconnects a call to the terminal. The feature is to switch the host computer address when this terminal connects to the host computer. Calling party switching method to collect. 2. The automatic connection control unit, when the fault of the faulty host computer is restored, calls / disconnects from the restored host computer to the terminal that is the target of the switchback, so that the host computer address 2. The calling party switching method according to claim 1, wherein the call is switched back to the original host computer. 3. The calling party switching method according to claim 1, wherein the address storage unit and the automatic connection control unit are software modules.