JPH0795864B2 - ISDN sub-address processing method in PBX - Google Patents

Description

[Detailed Description of the Invention] [Outline] ISD in PBX equipped with large-scale private private network of hierarchical structure
Regarding N sub-address processing method, ISD in PBX that can directly connect to extension terminal of lower network of PBX (or LAN) connected to public network by address
For the purpose of providing an N subaddress processing method, in a PBX connected to an ISDN public network, a subaddress extraction unit that extracts an ISDN subaddress from an address received from the ISDN public network, and the extracted ISDN subaddress are analyzed. A sub-address analysis unit and a sub-address separation unit that separates the ISDN sub-address into an intra-network number and an ISDN sub-address when it is determined that the sub-network address is included as a result of the analysis are transmitted from the received destination ISDN sub-address to the sub-network. It is configured to create a destination network number and a destination ISDN subaddress.

[Field of Industrial Application] The present invention relates to a subaddress processing method of ISDN in a PBX provided with a large-scale private dedicated network having a hierarchical structure.

With the spread of ISDN services in recent years, a private branch exchange (PBX) or LAN (hereinafter LA
It is required to identify terminals such as telephone terminals, data terminals, and facsimiles accommodated in PBX including N) and to connect to terminals in the PBX network without human intervention.

Therefore, use the subaddress in addition to the subscriber number,
CCITT recommends a method of designating a subaddress as an in-network number. The PB using the subaddress
A subscriber terminal (extension subscriber) that terminates in X can be specified for connection. However, recently, private private networks such as enterprises have grown in size to build private private networks with multiple PBXs, and a PBX (or LAN) as a subordinate network is provided under the PBX connected to the public network. It became so. However, even if I use the above subaddress, I am connected to the public network.
If another network exists below the PBX, it was not possible to address the terminal of the lower network to make the connection automatically. Therefore, the improvement is desired.

[Prior Art] FIG. 5 shows an explanatory view of a conventional example. The conventional connection scheme is shown in A. The conventional configuration is shown in B.

50 in FIG. 5 is an ISDN consisting of exchanges (or stations) 501 to 50n.
Public network, 51 is a subscriber or multiple PBX exchanges 511-51m
PBX network (local area network LAN) consisting of 52
Represents a small-scale network (for example, an exchange of a business office, a department, etc.) provided under the PBX network.

In ISDN, a channel for communication information (voice or data) and a channel for control information are multiplexed and transmitted between the subscriber and the network, and the information of the party (incoming) who wishes to connect from the calling subscriber The (address) is transmitted through a control channel (referred to as D channel), is received by the exchange, and is connected to the terminating exchange in which the other subscriber is accommodated. For example, the originating subscriber is the R of the public network 50 and the other subscriber is the exchange in the PBX network 51 accommodated in the exchange 504 of the public network 50.
It is assumed that the address of the PBX switch 512 is 03-111-2222 and the address of the terminal T is 1001 when it is a T belonging to 512.

In this case, according to the conventional technique that complies with the ISDN protocol, the calling subscriber transmits 03-111-2222 as the destination address number and 1001 as the destination subaddress as the address of the partner terminal. In response to this, switching connection is performed in the public network, and the exchange 504 of the public network receives the destination address number and the destination subaddress from the originating station side. The exchange 504 of the public network determines the contents thereof, supplements the line to the PBX exchange 512, and transmits the destination address and the destination subaddress. Upon receiving this information, PBX switch 512
The sub-address processing is performed by the control unit.

The conventional block diagram is shown in Fig. 5B. This B. indicates the contents of the processing executed by the control unit of the exchange 512 of the PBX network, and the PBX receives and receives the ISDN number 53 (in this case, "111-2222") as the address information sent from the public network. Then, the receiving destination ISDN subaddress 54 (“1001” in this example) is received. As for both address information, only the sub-address is extracted by the sub-address extracting mechanism 55 provided in the control unit inside the PBX.

The PBX exchange 512 determines from the subaddress that it is a certain subscriber T in its own station, and sends to the subscriber's line the transmission destination IS.
The DN sub address 56 (“1001”) is transmitted. The device of the subscriber terminal T receives this and a call is made.
Move on to communication.

[Problems to be Solved by the Invention] As described above, conventionally, an extension terminal of a PBX can be addressed as an ISDN subaddress, but recently, a network located at a lower level of the PBX (a small scale provided for each block unit) An exchange and LAN are installed as shown at 52 in Figure 5 A., and a system for efficient communication is used.

When addressing from a higher public network to a terminal accommodated in a subordinate network of such a PBX (for example, a terminal U in the network 52 in FIG. 5A), the PBX is conventionally provided by the ISDN subaddress as described above. Since only the address of the extension terminal can be addressed, it is impossible to address the terminal of the lower network, and there is a problem that the operator needs to operate to connect to the terminal of the lower network.

It is an object of the present invention to provide an ISDN sub-address processing method in a PBX that can directly connect to an extension terminal of a subordinate network of a PBX (or LAN) connected to a public network by an address.

[Means for Solving the Problems] FIG. 1 (a) is a principle configuration diagram of the present invention, and FIG. 1 (b) is an operation explanatory diagram according to the present invention.

In FIG. 1 (a), 11 is a sub-address extraction unit, 12 is a sub-address analysis unit, 13 is a sub-address separation unit, 14 is a switch network control unit, and in FIG.
Terminals accommodated in ISDN public network, 16 ISDN public network, 17 PB
X (or LAN), 18a is a PBX17 subnetwork switch, 18b, c
Is an extension terminal of the PBX 17, and 19a to 19c are extension terminals of the exchange 18a.

The present invention sends the ISDN subaddress including the terminal number of the lower network of the PBX from the transmitting terminal, and the PBX extracts the subaddress from the destination subaddress and analyzes it to determine whether the extension of the PBX or the address to the lower network. It makes a distinction and separates the address to the lower network into a destination address and a destination sub-address and sends it out.

[Operation] The operation of the configuration of FIG. 1 (a) will be described with reference to FIG. 1 (b).

The terminal 15 of the ISDN public network is connected to the exchange of the ISDN public network 16 at the S point, and the PBX 17 is connected to the T point.

When the terminal 15 in FIG. 1 (b) originates and 03-111-2222 is used as the destination address and 100111 is transmitted as the destination subaddress, the exchange of the ISDN public network 16 discriminates the destination address and sends it via the switching network. Destination address PBX 17
Start up by supplementing the line (station line) to. The destination address and the destination subaddress sent from the terminal 15 on the sending side are sent from the exchange of the ISDN public network 16 to this PBX.

This address is the destination ISDN as shown in Fig. 1 (a).
The number 101 (03-111-2222 in the example of FIG. 1 (b)) and the receiving destination ISDN subaddress 102 (10011 in the example of FIG. 1 (b))
1) Received as PBX. Upon receiving this, the subaddress extraction unit 11 of the PBX extracts only the subaddress excluding the destination ISDN number. The extracted sub-address is analyzed by the next reception / destination ISDN sub-address analysis unit 12. That is, the number of digits determining means 121 refers to a table in the memory 123 to determine the number of digits of the extension subaddress and the number of digits of other addresses, and the number analyzing means 122 refers to another table of the memory 123. Analyze whether it belongs to an extension or a lower network.

As a result, the switch network control unit 14 connects to the destination subaddress, and the subaddress is assigned to this PBX.
When it is the terminal number (extension number) in the network, the network number is transmitted to the terminal in the network. This example is shown in Fig. 1 (b).
This is a case of receiving an incoming call at the extension terminals 18b and 18c.

The sub-address analysis unit 12 determines that the sub-address is the PBX.
Address (1) of the lower network switch (18a in FIG. 1 (b))
001), the sub-address separation unit 13
In the sub-address, the lower network address (first
In the example of FIG. 1B, 1001 is set as the transmission destination network number 131, and an address other than the lower network address (1 in the example of FIG. 1B) is used.
1) is separated as the transmission destination ISDN subaddress 132 and transmitted to the lower network.

When the lower network 18a receives these addresses, it analyzes the subaddress, connects the corresponding extension terminal, and sends the address.

[Embodiment] FIG. 2 (a) is a diagram showing a numbering system for network configuration, FIG.
FIG. 2B is a diagram showing a concrete example of the network configuration, FIG. 2C is an explanatory diagram of an address information setting method for designating each terminal, FIG. 3 is a configuration diagram of an embodiment of PBX, and FIG. It is a processing flow figure of an example.

In FIG. 2 (a), 20 is an ISDN public network, and 21 is a subscriber or PBX.
Network, 22 is a terminal or PBX extension under the subscriber's line, 23 is a PBX
It represents the terminals under the extension (terminals in the lower network).
As a specific example corresponding to No. 23 to No. 23, the examples No. 200 to No. 230 in FIG.

In the number system for designating each terminal in the network configuration shown in FIG. 2 (a), an address as shown at the left end of the figure is assigned to the public network and the PBX network. The six terminals in FIG. 2 (a) are taken as an example, and the address setting method is as shown in FIG. 2 (c).
In FIG. 2 (c), * 1 represents a public network access number (prefix: 0, for example) in the PBX network, and this access number corresponds to the network identifier = ISDN of the ISDN address system.
Also, * 2 indicates that the sub-address is required only when is specified.

According to FIG. 2 (c), when an extension terminal under the control of the private network (PBX network) (lower network) is specified, the PB is added as a sub address from the public network to the address (ISDN subscriber number).
X extension number + ISDN number in the network are specified, and from the private network, the address (private network extension number) and subaddress (in the network)
ISDN number) is to be specified.

FIG. 3 is a block diagram of an embodiment according to the present invention. In the figure, 30 is a terminal circuit NT1 having an ISDN user / network interface function with the public network, 31 is a line processor (represented by LPR), and 32 is
PBX switching network (represented by NW), 33 is central processing unit (represented by CC), 34 is memory (represented by MM), 35
-1 to 3 and 36-1 to 36-2 are trunk circuits, and 37 and 38 are lower PBXs.

The PBX in FIG. 3 is a higher public network or the same PBX not shown.
The connection with the exchange in the network and the extension terminal 35-1 of the own exchange or the subordinate PBXs 37, 38 are mutually connected, and a predetermined terminal is connected according to the address designation as shown in FIG. 2 (c). Connection control.

CC33 in Fig. 3 uses the address information sent from the public network.
Received via the LPR31, analyze the contents of the address and identify whether it is the terminal of the extension number or the address of the lower network (PBX37, 38), control the selection of the NW32 and the control of the address transmission, and Controls sending of addresses to the network.

Explaining the processing flow diagram of the embodiment shown in FIG. 4, this processing flow shows the processing performed by the central processing unit CC33 of the PBX shown in FIG. 3 using the program and data in the memory 34, and from the upper public network. When an incoming call is received, the incoming call setup message is received and it is discriminated whether or not there is a sub address in addition to the ISDN subscriber number. It is known by the presence or absence of the called subaddress information element in the call setup message.
As a result, when there is no sub-address, a process of receiving an incoming call to the relay stand is performed (48 in FIG. 4).

If there is a sub address, the address including the ISDN number is extracted from the called sub address information element in the call setup message as the called sub address (at 41). Next, the number of digits of the destination subaddress is determined using the number of digits determination table 341 (FIG. 3) in the memory, and the number of digits of the destination address of the terminal (extension terminal of the PBX) in the own network is determined. . Next, numerical analysis is performed using the numerical analysis table 342 (FIG. 3) in the memory 34 in correspondence with the number of digits of the sub address. According to the result of numerical analysis, the subaddress is the terminal within the own network (the relevant PB
If it is not within the own network, a part of the called subaddress is set as the called address, and the rest is called the called subaddress. Set to (45). Then the relevant
The incoming line is connected by switching control of the PBX switching network NW32 (FIG. 3) (at 46), and the destination address or destination address and destination subaddress that have already been set are sent to the terminal or lower network, respectively.

[Advantages of the Invention] According to the present invention, it is possible to directly connect to an extension terminal of a lower network of a dedicated network such as a PBX or a LAN, and a connection time is shortened because manpower is not required, and operability is improved. Can be achieved.

[Brief description of drawings]

FIG. 1 (a) is a diagram showing the principle of the present invention, FIG. 1 (b) is a diagram for explaining the operation of the present invention, FIG. 2 (a) is a diagram showing a numbering system for the network configuration, and FIG. 2 (b). ) Is a diagram showing a specific example of the network configuration, FIG. 2 (c) is an explanatory diagram of a method for setting address information for designating each terminal, FIG. 3 is a configuration diagram of an embodiment of PBX, and FIG. 4 is an embodiment. FIG. 5 is an explanatory diagram of a conventional example, and FIG. 1 (a) and 1 (b), 11: sub-address extraction unit 12: reception / destination ISDN sub-address analysis unit 13: sub-address separation unit 14: switch network control unit 15: calling terminal 16: ISDN public network 17: PBX (or LAN) 18a: Subnetwork switch 18b, c: PBX17 extension terminal 19a to c: Exchange 18a extension terminal

Claims (1)

[Claims] 1. A PBX connected to an ISDN public network, a sub-address extraction unit (11) for extracting an ISDN sub-address from an address received from the ISDN public network, and a sub-address analysis unit (12) for analyzing the extracted ISDN sub-address. ), And if the result of the analysis indicates that the lower network address is included, the IS
A sub-address separating unit (13) for separating the DN sub-address into an intra-network number and an ISDN sub-address is provided, and the transmission destination intra-network number (131) and the transmission destination ISDN sub-address (13) are transmitted from the received destination ISDN sub-address to the lower network.
2) ISDN sub-address processing method in PBX characterized by creating