JPS63198463A - Repeater unit having connection extension function - Google Patents

Abstract

PURPOSE:To eliminate a need for re-calling at a calling system by making the titled repeater unit capable of extending a connection with a destination system while holding a communication bus between itself and the calling system. CONSTITUTION:One connection is formed from a calling system 3 through a repeater unit 2 to a directory service system 4B. With the connection being in this state, if the system 3 controls to release the connection from the system 3 to the system 4B after receiving an address relating to a destinatin system 4C, the unit 2, while holding the communication bus to the system 3 formed through an exchange type switching network 1-m, disconnects the connection, and the communication bus if necessary, to the system 4B. In this state, if the unit 2 receives, for instance, an address relating to the destination system 4C from the system 3, the unit 2 function to extend the connection from the system 3 to the system 4C. As a result, the system 3 can communicate with a desired destination system without calling again.

Description

[Detailed Description of the Invention] [Summary] In a switching network interconnection system in which a plurality of switching networks are linked via a relay system, it is possible to maintain a path between the calling system and the calling system. It is disclosed that a relay unit is provided that can reroute a call to another destination system.

[Industrial application field]

The present invention relates to a relay unit having a connection switching function, and particularly to a relay unit having a connection switching function that allows a call from a calling system to be transferred to another destination system while maintaining the path.

[Conventional technology]

A complex switching network interconnection system in which a plurality of switching networks are linked via a relay system, and a system in which a part of those switching networks is replaced with a relay system are being considered. When considering such systems, it is desirable that one calling system connected to a switching network or relay system be able to communicate with a destination system connected to any switching network or relay system. In this case, for example, if the calling system receives the address of the destination system from a directory in another system and then calls the destination system, the calling system will make two calls.

[Problem that the invention seeks to solve]

In the case of the conventional method described above, even if the call is made twice or through the same relay system through a circuit-switched switching network, the calling system needs to make a re-call in the circuit-switched switching network. In addition, there is a possibility that the call charges of the circuit-switched switching network will increase undesirably.

[Means for solving problems]

The present invention solves the above problems and eliminates the need for re-calling from the calling system to the circuit-switched switching network. FIG. 1 shows a basic configuration diagram of the present invention. In the figure, 1-1, 1-2, . . . 1-m are switching networks, 2 is a relay system, 3 is a calling system, 4A and 4C are destination systems, 4B is a directory service system,
5 represents a directory.

For example, the relay system 2 is configured to switch between switching networks 1 and 1 among a plurality of switching networks.
-1.1-2, . . . 1-m are shown connected to each other. Then, the relay system 2 calls the directory service system 4B as necessary, and
It has a function of receiving a specific, for example, subnetwork address regarding the destination system 4C and relaying the call to the side facing the switching network 1-1.

In the case shown in FIG. 1, the relay system 2 also serves as a relay unit according to the present invention, but it is not necessarily limited to this. Calling system 3
The exchange M4 (1-m) between the relay system 2 and the relay system 2 is a circuit switching type exchange network.

For example, the relay unit (ICU) maintains the connection with the calling system 3 and accesses the directory.
It has a connection switching function that disconnects the connection with the service system 4B and establishes a connection between the destination system 4C and the calling system 3.

[Effect]

For example, although the present invention is not limited to this, the calling system 3 calls the directory service system 4B to index the directory 5, receives an address for the destination system 4C, and based on this, the calling system 3 Consider a case where communication is performed with the destination system 4C.

In this case, the relay unit (ICU) has a communication path between it and the calling system 3 on the line-switched switching network (1-m), and also has a communication bus between it and the directory service system 4B.

At this time, one connection is established from the calling system 3 to the relay unit and then to the directory service system 4B via the above two communication buses. In this state, when the calling system 3 receives the address related to the destination system 4C and performs control to release the connection from the calling system 3 to the directory service system 4B, the relay unit ICU The connection with the directory service system 4B and the communication bus are disconnected as necessary, while maintaining the communication bus connected to the line-switched M4 (1-m). In this state, relay unit 1-IC
U receives information on establishing a new connection from the calling system 3 through the path it holds, such as the destination system 4.
Upon receiving the address for C, relay system 2 functions to extend a new connection from the path from calling system 3 to destination system 4C.

This allows the calling system 3 to communicate with a desired destination system without calling again through the circuit-switched switching network (1-m).

(Embodiment) FIG. 2 shows the configuration of an embodiment of a relay unit. The symbol ICU in the figure corresponds to that in FIG. 1, and 6-1 is the switching network #
1 connection mechanism, in which the relay unit 1-ICU is connected to the switching network #
It has a function to connect with i. Reference numeral 7 denotes a bus maintenance mechanism, which has a function of maintaining the communication path currently formed via the relay unit ICU. Reference numeral 8 denotes a path holding mechanism that, in response to an instruction from the calling system 3 that is currently forming a connection, disconnects the connection with, for example, the directory service system 4B and disconnects the connection with the calling system 3. It has a function to maintain the communication path between the two for a predetermined period of time.

Reference numeral 9 denotes a connection switching mechanism, which upon receiving information regarding the destination system 4C from the calling system 3 within the holding period based on the bus holding mechanism 8, transfers the connection extended through the path from the calling system 3. This newly formed connection and the communication path it is using is managed by the bus maintenance mechanism 7, which has the ability to extend to the destination system 4C.

〔Effect of the invention〕

As described above, according to the present invention, there is no need for the calling system to call again on a line-switched switching network with the relay unit when re-establishing connections that share a common route to the relay unit.

[Brief explanation of the drawing]

FIG. 1 shows the principle configuration of the present invention, and FIG. 2 shows the configuration of an embodiment of a relay unit. In the figure, 1-i represents a switching network, 2 a relay system, 3 a calling system, 4A and 4C a destination system, 4B a directory service system, and ICU a relay unit. $ 1 Figure f fin 5-,-y tote brown 2123

Claims (1)

[Scope of Claims] A plurality of switching networks (1-i) including at least one circuit-switched (including telephone network) switching network are connected to a relay system (2-i).
), and is connected to any one circuit-switched switching network (1-m).
In a switched network interconnection system configured such that 3) can communicate with destination systems (4A or 4C) connected to the plurality of switched networks (1-i), the calling system (3) has one purpose. System (4B)
One relay unit existing on the communication path communicating with the calling system (4B) maintains the communication path with the calling system (3) and establishes a connection with the destination system (4B). A relay unit having a connection switching function characterized by having a function of disconnecting the connection and switching the connection with another destination system (4C).