JP2001268223A - Relay exchange and its pbx relay connection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a relay exchange and its PBX relay connection method, where it is not required to provide a PB tone transmitter for every caller-side terminal, in the case of being connected to the extension of a PBX via the relay exchange and a subscriber need not depress dial buttons for the transmission of a PB tone after the connection of the PBX to the subscriber. SOLUTION: A dial storage register 63 stores dial information from a subscribe exchange 2. An extension number discrimination section 671 reads the dial information stored in the register 63, discriminates as to whether the information includes an extension number of a PBX 4, stores this number to an extension number storage memory 661, when the discrimination section 671 discriminates that the information includes the extension number. A transmitted incoming number edit number edit section 672 edits number information resulting from deleting the extension number from the dial information and give the edited number information to the subscriber exchange 5. After the end of connection and receiving a replay, a PB tone transmission control section 673 reads an extension number stored in the memory 661 and transmits a PB signal corresponding to the extension number to the PBX 4 to connect called and caller subscribers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transit exchange and a transit connection method thereof, and more particularly to a private branch exchange (PBX: prx) from a subscriber exchange of another telephone company via a transit exchange.
The present invention relates to a transit exchange for transiting to an extension of an ihate branch exchange and a PBX transit connection method thereof.

[0002]

2. Description of the Related Art Conventionally, in this type of telephone connection system, that is, a PBX is directly transmitted from a calling local exchange to a direct route.
Japanese Patent Application Laid-Open No. 60-100860 also discloses a case where a connection is made to a PBX from a communication network of another telephone operating company via a transit exchange without being connected to the subscriber exchange on the receiving side containing the BX, and the extension is terminated. As shown in the publication, after a call arrives at the called subscriber's exchange, the caller presses the PBX extension number by the calling terminal in accordance with the guidance, and the calling terminal presses a push button (PB: PushBut).
ton) signal.

[0005] As described above, in a normal telephone service, when the destination terminal is a PBX extension, the connection is performed as follows. First, a call is originated from the originating local exchange, and arrives at the destination local exchange via the transit exchange. The receiving local exchange is connected to the PBX, returns a response signal to the transit exchange, and is in the same state as during a telephone call to be charged. Next, when the caller follows the voice guidance from the PBX and presses the extension number from the calling terminal,
The PB sound is transmitted from the calling terminal. In the PBX that receives the PB sound, the call arrives at the subscriber of the corresponding extension number.

[0004]

In the above-mentioned conventional system, a PB sound transmitting device is required for each terminal on the transmitting side, and exchanges from a calling signal to a response signal are exchanged between the local exchanges. Therefore, at the time when the response signal is received by the originating local exchange, the state of the call is the same as that during a call, and even if the charge is being made during the call, the guidance from the PBX is not available. Therefore, a dial pressing operation for transmitting the PB sound is required, and there is a problem that economy and convenience are reduced. An object of the present invention is to provide a PBX for connecting to a PBX extension via a transit exchange.
It is an object of the present invention to provide a transit exchange and a PBX transit connection method that can eliminate the necessity of providing a B tone transmitting device and eliminate the need for a subscriber to press a dial for transmitting a PB tone after a PBX connection. .

[0005]

SUMMARY OF THE INVENTION A transit exchange according to the present invention comprises:
Using the dial information received from the originating local exchange, the transit exchange identifies and stores the extension number of the subscriber accommodated in the private branch exchange connected to the destination local exchange,
A connection is established between the called subscriber and the calling subscriber by transmitting the extension number to the private branch exchange by a push button signal from the transit exchange after responding to the called subscriber's exchange. Configuration.

The transit exchange of the present invention further comprises a storage unit for receiving and storing dial information transmitted from the originating local exchange, and a pusher for transmitting a multi-frequency push button signal to the destination local exchange. A button sound transmission device, an extension number holding memory for storing an extension number of a subscriber accommodated in a private branch exchange connected to the called local exchange, and a central processing unit for controlling each part of the transit exchange. The central processing unit identifies the extension number from the dialing information, stores the extension number in the extension number holding memory, completes the connection with the called local exchange, and reads out the extension number after the response. And the central processing unit is instructed to send a push button signal corresponding to the following from the push button sound sending device. An extension number reception determining unit that reads out the earl information and determines whether or not the information includes an extension number, and if it determines that the extension number is included, stores the extension number in the extension number holding memory. And a sending / receiving number editing unit for editing the number information obtained by removing the extension number from the dial information, and referring to the extension number holding memory to determine whether or not the extension number is stored and stored. A push button sound transmission control unit that instructs to send a push button signal corresponding to this extension number from the push button sound transmission device when the extension number is read may be provided, or the central processing unit may Subscriber attribute determination for determining, based on the dial information, whether the attribute of the originating subscriber is a subscriber to whom the virtual private network service is applied A service for controlling the virtual private network service in order to obtain selection information to the called local exchange when the subscriber attribute is determined to be a subscriber to which the virtual private network service is applied by the subscriber attribute determining unit. A service control point access control unit that accesses a control node, and refers to the extension number holding memory to determine whether or not the extension number is stored. If the extension number is stored, read the extension number and corresponds to the extension number. And a push button sound transmission control unit that instructs the push button sound transmission device to transmit a push button signal to be transmitted from the push button sound transmission device.

[0007] The connection method in the transit exchange of the present invention comprises:
The dial information sent from the originating local exchange is received and stored in the dial storage register, the dial information stored in this register is read out, and the information is connected to the destination local exchange in the information. It is determined whether or not the extension number of the subscriber accommodated in the private branch exchange is included, and if it is determined that the extension number is included, this number is stored in a memory holding the extension number, and the dialing is performed. Edit the number information by removing the extension number from the information,
After the connection is completed and this connection is completed and a response is received, the extension number stored in the memory is read out, a push button signal corresponding to the extension number is sent to the private branch exchange, and the called side and the calling side subscriber are connected. The connection may be made, or whether the attribute of the originating subscriber is a subscriber to which the virtual private network service is applied is determined by dial information transmitted from the originating local exchange, and the subscriber attribute is determined. When it is determined that the subscriber is a virtual private network service subscriber, this dial information is stored in the memory holding the extension number, and a service control node connected to the transit exchange and controlling the virtual private network service is accessed. Obtain the selection information for the local exchange on the called side, connect to the downstream exchange, complete this connection, and read the extension number stored in the memory after responding. It sends a push button signal corresponding to the extension number to said private branch exchange, may be connected to the calling and the called subscriber.

According to the present invention, an extension number reception judging unit for judging the extension number of the PBX to the transit exchange, an extension number holding memory for storing the extension number, and a PB tone for transmitting a PB tone corresponding to the extension number When the caller presses "# + extension number" at the end of the telephone number dialed, the extension number is held in the extension number holding memory,
By transmitting a PB tone corresponding to the extension number held in the extension number holding memory upon receiving a response signal from the called local exchange, the necessity of providing a PB tone transmission device for each terminal is eliminated. , When connected to a PBX, it is possible to receive a call to a subscriber corresponding to an extension number in the PBX without guidance connection.

[0009]

Next, a first embodiment of the present invention will be described with reference to the drawings.

Referring to FIG. 1, there is shown an example of a switching system to which a first embodiment of the present invention is applied, in which a subscriber exchange 2 accommodating an originating subscriber 1 and an extension subscriber 3 are accommodated. It comprises a PBX 4, a local exchange 5 connected to the PBX 4, and a transit exchange 6 for transiting the local exchange 2 and the local exchange 5. In this case, the subscriber exchange 2 belongs to, for example, a communication network of another telephone operating company, and the calling subscriber 1 must be connected to the extension subscriber 3 via the transit exchange 6 without fail.

The transit exchange 6 is provided with an incoming trunk (incoming) for interfacing with a line from the local exchange 2.
trunk: ICT) 61 and an outgoing trunk (outgoing) that interfaces with a line to the local exchange 5.
(trunk: OGT) 62, a dial storage register 63 for receiving and storing dial information transmitted from the local exchange 2 on the transmitting side, and a PB sound transmitting device 64 for transmitting PB signals of multiple frequencies to the local exchange on the receiving side. , These ICs
A communication path switch 65 that accommodates T61, OGT 62, dial storage register 63, and PB sound transmission device 64;
A storage unit (not shown) for a program for controlling the entire transit exchange and a P connected to the subscriber exchange 5 on the receiving side
A main storage device 6 having an extension number holding memory 661 for storing the extension number of the extension subscriber 3 accommodated in the BX 4
6 and a central processing unit 67 for controlling each part of the relay exchange according to a program read from the main storage device 66.

The central processing unit 67 identifies the extension number from the dial information received from the local exchange 2, stores it in the extension number holding memory 661, completes the connection to the local exchange 5 on the receiving side, and after responding, This is a configuration for instructing the PB sound transmitting device 64 to transmit a PB signal corresponding to the read extension number. The dial information stored in the dial storage register 63 is read, and the extension number is included in the information. The extension number reception determining unit 671 stores the extension number in the extension number holding memory 661 when the extension number is included, and edits the number information obtained by deleting the extension number from the dial information. It refers to the sending destination number editing unit 672 and the extension number holding memory 661 to determine whether or not the extension number is stored, and if the extension number is stored. Has a PB tone sending control unit 673 that instructs to deliver the PB signal corresponding to the extension number reads the extension from PB sound delivery device 64.

FIG. 2 is a flowchart showing the flow of processing in the transit exchange of the present invention. The operation will be described below with reference to FIGS.

In FIG. 1, when a calling subscriber 1 makes a call, a calling signal arrives at the ICT 61 to activate the transit exchange 6 from the local exchange 2 on the calling side. In this case, the calling signal contains the subscriber's telephone number of the receiving side and the following information as P.
An identification code indicating the BX extension number, for example, # and extension number is included. The transit exchange 6 stores the dial number in the call signal in the dial storage register 63 upon receiving the call signal to the ICT 61. The extension number reception judging section 671 reads the dial number stored in the dial storage register 63 (Step 1: abbreviated as S1, hereinafter the same).

The extension number reception determining section 671 checks the dial number one digit at a time (S2, S3), determines whether or not a # is present up to the Nth digit (S4). The numbers after # are stored in the extension number holding memory 661 in the main storage device 66 (S5). If there is no # in the dial number read from the dial storage register 63 and there is no number in this register, the process ends (S6).

On the other hand, the sending destination number editing unit 672 refers to the extension number holding memory 661 (S11) and determines whether or not an extension number exists (S12). Then, it is determined whether or not # exists in the Nth digit (S13 to S15).
Exists, the extension number after # is deleted (S1).
6) A call signal including the subscriber's telephone number not including the extension number is transmitted to the downstream subscriber's exchange 5 via the OGT 62. This is to prevent a PB tone from being transmitted from a plurality of exchanges on a relay ladder in the case of a call passing through two or more exchanges.

When this call signal is sent to the local exchange 5 on the receiving side, a response signal is received, and this response signal is returned to the local exchange 2 on the originating side. The transmission control unit 673 refers to the extension number holding memory 661 (S21) and determines whether or not there is an extension number (S22). If the extension number exists, the extension number stored in the extension number holding memory 661 is read out, and the PB sound is transmitted so as to transmit the PB sound corresponding to the extension number.
A command is issued to the sound transmitting device 64 (S23), and a PB sound is transmitted to the PBX 4 on the receiving side via the communication path switch 65. Thereafter, a response signal is returned to the local exchange 2 on the transmitting side.

If a PBX incoming call is realized by the above procedure,
The PB sound transmitting device need only be provided in the transit exchange, not in each calling terminal, and it is possible to make an incoming call to an extension subscriber in the PBX without guidance connection from the PBX.

Next, a second embodiment of the present invention will be described with reference to the drawings. In the above-described first embodiment, a normal PBX incoming call has been described as an example, but a service control point (Service Control P
point: SCP), and PBX termination in an intelligent network service via a service control node functioning as a relay exchange is also possible.

As one example, a VPN (Virtual) is used.
Private Network (Virtual Private Network) service. With the VPN service, a virtual extension number is assigned to a normal telephone terminal, the data is held by the service control node, the telephone number of the called party corresponding to the extension number is notified to the transit exchange, and the incoming call can be received. This is a service that provides a virtual network that allows telephone calls in the extension number format.

FIG. 3A shows a switching system to which the second embodiment of the present invention is applied.
, A PBX 4 accommodating an extension subscriber 3, a subscriber exchange 5 connected to the PBX 4,
It is composed of a relay exchange 6 for relay-connecting the local exchanges 2 and 5, and a service control node 7 connected to the relay exchange 6. In this case, the local exchange 2 belongs to, for example, a communication network of another telephone operating company, and
In order to connect with the extension subscriber 3, the connection must be made via the relay exchange 6.

FIG. 3B shows the transit exchange 6 in FIG.
FIG. 3 is a diagram showing an example of the configuration. In (b), those having the same reference numerals as those described in the first embodiment have the same functions, and thus description thereof will be omitted. The central processing unit 68 determines whether or not the attribute of the calling subscriber is a subscriber to whom the virtual private network service is applied, based on dial information sent from the local exchange 2 on the calling side. When,
When the subscriber attribute is judged to be a subscriber to whom the virtual private network service is applied by the subscriber attribute judging section 681, the service for controlling the virtual private network service in order to obtain selection information to the subscriber exchange 5 on the receiving side. And an SCP access control unit 682 for accessing the control node 7.

The operation of the second embodiment will be described below (flow chart is omitted). First, a call is originated from the calling subscriber's exchange 2, and the dial number in the extension number format is received by the dial storage register 63 of the transit exchange 6 and stored in the extension number holding memory 661. In the transit exchange 6, the subscriber attribute determining unit 681 refers to a correspondence table (not shown) registered in advance, and determines from the received information that the attribute of the originating subscriber is a VPN service subscriber. Then, the SCP access control unit 682 accesses the service control node 7 to obtain a subscriber telephone number for outgoing connection to the destination local exchange.

The service control node 7 converts the extension number to the actual subscriber telephone number by using a conversion table (not shown) registered in advance, determines that the destination is a PBX, and transmits the PB sound. It instructs the relay exchange 6. The transit exchange 6 determines a connection destination based on the received subscriber telephone number, and transmits a call signal including the subscriber telephone number to the subscriber exchange.

On the other hand, the receiving local exchange 5 receives this call signal and returns a response signal. In the transit exchange 6, the PB sound transmission control unit 673 transmits a PB sound corresponding to the extension number based on the PB sound transmission instructed by the service control node 7, triggered by a response signal from the PBX 4. Then, based on the PB sound, the call arrives at the extension subscriber 3 in the PBX.

[0026]

As described above, according to the present invention, the extension number of the subscriber accommodated in the private branch exchange connected to the called local exchange based on the dial information received from the originating local exchange. Is stored in the transit exchange, connected to the subscriber exchange on the receiving side, and after responding, the extension number is transmitted from the transit exchange to the private branch exchange by a push button signal, so that the subscriber on the receiving side and the subscriber on the originating side are sent. It is not necessary to hold a PB sending device for each terminal, and it is not necessary to perform a “PB sound sending operation according to guidance” after a call is in the same state as during a call. , PBX, and the like.

[Brief description of the drawings]

FIG. 1A is a diagram showing a switching system to which a first embodiment of the present invention is applied. (B) is a figure which shows the example of a structure of the relay exchange in (a).

FIG. 2 is a flowchart illustrating a processing flow in the transit exchange according to the first embodiment of this invention.

FIG. 3A is a diagram illustrating a switching system to which a second embodiment of the present invention is applied; (B) is a figure which shows the example of a structure of the relay exchange in (a).

[Explanation of symbols]

 Reference Signs List 1 originating subscriber 2, 5 subscriber exchange 3 extension subscriber 4 PBX 6 transit exchange 7 service control node 61 ICT 62 OGT 63 dial storage register 64 PB sound transmission device 65 communication path switch 66 main storage device 67, 68 central processing device 661 extension number holding memory 672 sending / receiving number editing unit 673 PB sound sending control unit 681 subscriber attribute judgment unit 682 SCP access control unit

Claims (6)

[Claims] 1. A transit exchange identifies and stores an extension number of a subscriber accommodated in a private branch exchange connected to a called local exchange according to dial information received from a calling local exchange. Connecting the subscriber on the receiving side and the subscriber on the originating side by sending the extension number to the private branch exchange by a push button signal from the relay exchange after responding to the subscriber exchange. And a transit exchange. 2. A storage unit for receiving and storing dial information transmitted from an originating local exchange, a push button sound transmitting device for transmitting a multi-frequency push button signal to a destination local exchange, and an incoming call. An extension number holding memory for storing the extension number of the subscriber accommodated in the private branch exchange connected to the local exchange, and a central processing unit for controlling each part of the transit exchange. Identifying the extension number from the dial information, storing the extension number in the extension number holding memory, completing the connection with the subscriber's exchange on the receiving side, and after responding, reads the push button signal corresponding to the read extension number. A relay exchange for instructing transmission from the push button sound transmission device. 3. The central processing unit reads dial information stored in the storage unit, determines whether an extension number is included in the information, and determines that an extension number is included. An extension number reception determining unit that stores this number in the extension number holding memory, a sending / receiving number editing unit that edits the number information obtained by deleting the extension number from the dial information, and refer to the extension number holding memory. It is determined whether or not the extension number is stored. If the extension number is stored, the extension number is read out and a push button sound transmission commanding to transmit a push button signal corresponding to the extension number from the push button sound transmission device is transmitted. The relay exchange according to claim 2, further comprising a control unit. 4. The central processing unit comprises: a subscriber attribute judging unit for judging, based on the dial information, whether an attribute of a calling subscriber is a subscriber to whom a virtual private network service is applied, A service for accessing a service control node controlling the virtual private network service in order to obtain selection information for a destination local exchange when the subscriber attribute is determined to be a virtual private network service applicable subscriber; The control point access control unit, referring to the extension number holding memory, determines whether or not the extension number is stored, and if the extension number is stored, reads the extension number and outputs a push button signal corresponding to the extension number. 3. A push button sound transmission control unit for instructing transmission from a push button sound transmission device. Relay exchange. 5. Dial information transmitted from a local exchange on the calling side is received and stored in a dial storage register, and the dial information stored in this register is read out.
It is determined whether or not the information includes the extension number of the subscriber accommodated in the private branch exchange connected to the called local exchange, and when it is determined that the extension number is included. Stores this number in a memory that holds the extension number, edits the number information obtained by deleting the extension number from the dial information, connects to the downstream exchange, completes this connection, and stores the extension number stored in the memory after responding. And transmitting a push button signal corresponding to the extension number to the private branch exchange to connect the called side and the calling side subscriber to each other. 6. Determine whether or not the attribute of the originating subscriber is a subscriber to which the virtual private network service is applied, based on dial information sent from the local exchange on the originating side. If it is determined that the subscriber is a service subscriber, the dial information is stored in a memory holding an extension number, and a service control node connected to the transit exchange and controlling the virtual private network service is accessed to join the called party. Obtains the selection information to the local exchange, connects to the downstream exchange, reads out the extension number stored in the memory after the connection is completed and responds, sends a push button signal corresponding to this extension number to the private branch exchange, A PBX relay connection method in a transit exchange, comprising connecting a called party to a calling party.