JPH08331257A - Separated outgoing/incoming call processing control system - Google Patents

Abstract

PURPOSE: To unify call processing between the cases of intra-present station connection and remote connection while separating call processing into the processing on the call originating side and the processing on the call terminating side. CONSTITUTION: A call origination control part 10 receives a call originate signal, connects it to a subscriber circuit 100a and the incoming side of a virtual internal trunk 50 and transmits a connection request signal through a call control signal path 70 to a call termination control part 20. The call termination control part 20 connects a subscriber circuit 100b and the outgoing side of the virtual internal trunk and sends a call terminating instruction signal to the subscriber circuit 100b. When a call terminating terminal responds and receives a call termination complete signal, the call termination control part sends a path connecting request to a virtual path control part 40 and sends a connection complete signal through the call control signal path to the call origination control part, and the call origination control part sends a path connecting request to the virtual path control part 40. The virtual path control part receives the path connecting requests from both the call origination and termination control parts and connects a real path while controlling a switch control part 60.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a call origination / termination separated call control system, and more particularly to a virtual internal trunk and a virtual path controller.
The present invention relates to a call origination / destination split call control method of a program storage type exchange capable of performing bilateral connection by managing and connecting a partner to be connected by a virtual path control unit.

[0002]

2. Description of the Related Art In a conventional call control system, as shown in FIG. 2, a call control unit 80 processes both originating and terminating sides to perform exchange processing.
The call control unit 80 includes the subscriber circuit 100a and the subscriber circuit 100.
In consideration of b, the switch control unit 60 is instructed to perform connection processing and service provision.

[0003]

As described above, in call connection control, the call control unit 80 must always control the subscribers on both sides of the call, and the same applies when a switching service is provided. .

However, this is not limited to the case where a bilateral connection is made to extend between exchanges, and the bilateral connection between the subscriber circuit 100a in the own station and a trunk to the outside of the station or a trunk from the outside of the station. Although connection is established, the call control unit 80 uses a call origination / departure separation method in which switching services are provided only to the subscriber circuits accommodated in the own station.

Further, when a service request is issued from the subscriber circuit 100b, which is a connection partner of the subscriber circuit 100a, while the service is being provided to the subscriber circuit 100a, the mutual services control the respective subscriber circuits. As a result, contention occurs, and the service that should be performed becomes infeasible, so it is necessary to make adjustments so that the service does not cause contention.

[0006] Therefore, when adding a service, it is necessary to have a program structure that allows existing services and new services to coexist while paying attention not to cause competition with existing services.

For this reason, the call control unit 80 has to have a program structure that takes into consideration the problem that the internal call connection and the external call connection must have different call processing functions and the service competition. There is a problem that the structure becomes difficult to add and the call control unit 80 becomes very complicated.

An object of the present invention is to provide a virtual internal trunk so that the call control unit 80 is separated into a calling call control unit and a receiving call control unit, and a call originating and terminating call control system is adopted even in the connection within the own station. By so doing, it is possible to provide unity of call control, to prevent contention between the service for the calling subscriber and the service for the called subscriber, and to provide a call origination / detachment call control method in which the program structure is not complicated.

[0009]

According to the call origination / detachment call control system of the present invention, in a program storage type exchange, a call control unit for controlling a call and a call control unit for allocating call control on the caller side and a call receiver are provided. It is separated into an incoming call control unit for performing call control on the side, the caller is connected to the virtual internal trunk through the call control unit, and the called party is connected to the virtual internal trunk through the call control unit. However, a virtual path is set by the virtual internal trunk.

The call control section and the call control section share the call control on the caller side with the virtual internal trunk to which the caller and the callee are connected.
The call control unit that connects the caller to the virtual internal trunk, the call control unit that shares call control on the callee side and connects the callee to the virtual internal trunk, and a specified real A switch control unit for connecting a path, the caller and the virtual internal trunk, and the connection status of the called party and the virtual internal trunk is monitored, and the other party connected via the virtual internal trunk is managed, And a virtual path control unit for instructing the switch control unit to connect an actual path.

[0011]

The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of an originating / arriving separated call control system having a virtual internal trunk according to the present invention.

In FIG. 1, subscriber circuits 100a, 10a
0b and the terminal control signal paths 30a and 30b for exchanging control signals with the subscriber circuits 100a and 100b and the terminal control signal paths 30a and 30b for controlling the calls originated in the subscriber circuits 100a and 100b. A call control unit 10 and an incoming call control unit 20, and a virtual internal trunk 50 that is a virtual connection destination of the subscriber circuit 100a managed by the outgoing call control unit 10 and the subscriber circuit 100b managed by the incoming call control unit 20. The virtual path control unit 4 that grasps the call control unit 10 and the call control unit 20 that are the connection destinations of the virtual internal trunk 50, instructs the switch control unit 60, and connects the communication path.
0, a call control signal path 70 between the call origination control unit 10 and the call arrival control unit 20, and a switch control unit 60 that connects the communication path.

When a terminal (not shown) connected to the subscriber circuit 100a is operated and a calling operation is performed, a terminal control signal "calling" indicating that the calling operation has occurred from the subscriber circuit 100a. The "call" signal is received by the call control unit 10 through the terminal control signal path 30a. With this "call" signal,
The calling control unit 10 gives an instruction to the virtual path control unit 40 to virtually connect the subscriber circuit 100a and the incoming side of the virtual internal trunk 50. At the same time, the call control unit 10 uses the call control signal path 70 to send a "connection request" signal to the call control unit 20.

Incoming call control unit 2 which has received the "connection request" signal
0 is the virtual internal trunk 50 included in the "connection request" signal
The virtual path control unit 40 is instructed to virtually connect the calling side of the subscriber circuit 100b to the called side,
At the same time, by using the terminal control signal path 30b, the subscriber circuit 10
A "call-in instruction" signal is sent to 0b.

When the terminal (not shown) connected to the subscriber circuit 100b is taken off-hook, a "call completion" signal is sent from the subscriber circuit 100b through the terminal control signal path 30b. The incoming call control unit 20 transmitted to the virtual path control unit 20 sends a path connection request to the virtual path control unit 40, and at the same time sends a "connection complete" signal through the call control signal path 70. The call control unit 10 that has received the "connection completed" signal makes a path connection request to the virtual path control unit 40.

The virtual path control unit 40 uses the switch control unit 60 to connect the actual path in response to a path connection request from both sides of the call.

The above is the description of the connection within the own station, but the same applies to the connection to the outside of the own station or from the outside of the own station to the own station, and the connection control is performed only by the subscriber circuit becoming the outgoing trunk or the incoming trunk. The unity of is maintained.

On the other hand, in the case of service, the call control unit 10 or the call reception control unit 20 has the subscriber circuits 100a and 100b.
And the virtual internal trunk 50 are connected, they are separated from each other's call control. When a service occurs, the service is adjusted by the "service negotiation" signal using the call control signal path 70. , The call control unit 10 does not control the receiving side subscriber circuit 100b, and the call control unit 20 receives the "service negotiation" signal.
Controls the incoming subscriber circuit 100b.

Therefore, the competition of subscriber circuit control does not occur, and the competition between services can be eliminated.

[0020]

As described above, the call origination / detachment call control system of the present invention provides a virtual internal trunk, which is a virtual trunk, inside the exchange, and separates the call control unit into the call origination control unit and the call termination control unit. Each call control unit connects the above-mentioned virtual internal trunk to the subscriber or outside trunk, and a virtual path control unit is provided to manage the connection destination of the virtual internal trunk. By connecting via the virtual internal trunk, the calling subscriber and the virtual internal trunk,
It can be regarded as two calls, that is, the virtual internal trunk and the called subscriber, and the service can be independently executed for the calling subscriber and the called subscriber.

Further, in the case of an outgoing call from the outside of the office or an incoming call from the outside of the office, the connection destination of the virtual internal trunk is simply changed from the subscriber circuit to the trunk, and the unity of the connection control is maintained. Since the incoming and outgoing call processing is separated, there is an advantage that contention of services for each is resolved.

[Brief description of drawings]

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

FIG. 2 is a block diagram of a conventional call control system.

[Explanation of symbols]

 10 Call Control Section 20 Incoming Call Control Section 30a, 30b Terminal Control Signal Path 40 Virtual Path Control Section 50 Virtual Internal Trunk 60 Switch Control Section 70 Call Control Signal Path 80 Call Control Section 100a, 100b Subscriber Circuit

Claims (2)

[Claims] 1. In a program storage type exchange, a call control unit for controlling a call is separated into a call control unit for sharing call control on the caller side and an incoming call control unit for controlling call on the callee side. A caller is connected to a virtual internal trunk via the call control unit, a callee is connected to the virtual internal trunk via the call control unit, and a virtual path is set by the virtual internal trunk. A distinctive call origination / termination call control method. 2. The virtual internal trunk to which the call control unit and the call control unit connect as a partner of the caller and the callee, and call control on the caller side, and the caller is assigned to the virtual internal trunk. The call control unit that connects to the virtual internal trunk, the call control unit that shares the call control of the called party and connects the called party to the virtual internal trunk, and the switch that connects the designated real path The control unit, the caller and the virtual internal trunk, and monitors the connection status of the callee and the virtual internal trunk, manages the other party connected via the virtual internal trunk, and the switch control unit. The call origination / destination call control system according to claim 1, further comprising: a virtual path control unit for instructing connection of a real path.