JPH0549057A - Terminal equipment management device - Google Patents

Abstract

PURPOSE:To designate a called extension terminal equipment by using an extension number included in an ISDN address in a setup message in an ISDN exchange or an ISDN key telephone set. CONSTITUTION:A table cross-referring an extension number of each terminal equipment, a sub address and a port number to which the terminal equipment connects is provided in the inside of the terminal equipment management device 22. When a terminal equipment 8 calls a terminal equipment 2, an extension number 120 of the terminal equipment 2 is set to an incoming ISDN number in a setup message SM3. The terminal equipment management device 22 obtains the sub address 12 of the terminal equipment 2 from the table and sends the setup message SM in which the incoming ISDN sub address 12 is set to a port P1 to connect the terminal equipments 12 and 8. When the terminal equipment 2 is called from an external line, a setup message SM4 in which an incoming ISDN sub address is set to 120 is sent to the terminal equipment management device 22. The terminal equipment management device 22 refers the table to send the setup message SM to which the incoming ISDN sub address 12 is set to the port P1 to connect the terminal equipment 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ISDN (Integrated Service Digital Network) exchange or a terminal management device such as an ISDN button telephone system.

[0002]

2. Description of the Related Art FIG. 4 shows a basic ISDN interface and a plurality of ISDNs connected in a multi-drop manner.
The structure of a terminal is shown. The network 20 of communication circuits is connected to the subscriber's terminals 1, 2, 3, 4 and the like via the subscriber's home data line terminating device (DSU) 21.

In ISDN, when a call is made or a call is received, a call called a setup message is used to process a call. In the setup message, I
There is an area for storing the SDN address. The ISDN address includes a calling ISDN address indicating the address of the calling terminal and a destination ISDN address indicating the address of the called terminal.

The ISDN address is further divided into an ISDN number and an ISDN sub address. When multiple terminals are multi-drop connected to one interface, by using the ISDN subaddress,
Each terminal can recognize whether it is a setup message addressed to itself.

FIG. 5 is a diagram showing details of the DSU 21 and the subsequent parts of FIG. When terminals capable of recognizing an ISDN subaddress are connected to one interface, each terminal stores different ISDN subaddresses. As shown in the figure, a terminal 1 having subaddresses 11, 12, and 13 is connected to a network 20 via a DSU 21.
When 2 and 3 are connected and the user wants to communicate with the terminal having the sub-address 12, the calling terminal calls the receiving ISD.
The N subaddress is set to 12, and the setup message SM is transmitted. The terminal having the sub address 12 receives the IS of the setup message SM sent.
By looking at the DN subaddress, it is determined that the setup message is addressed to itself.

Next, as shown in FIG. 6, by connecting an ISDN switch or an ISDN button telephone system main unit (hereinafter referred to as a terminal management unit) 22 between the network 20 and the terminal, the extension side interface Consider the case where the number is increased. Terminals 1, 2, 3 having subaddresses 11, 12, 13 on the extension-side first interface (port P1), and terminals 4, 5, 6 having subaddresses 11, 12, 13 on the second interface (port P2) ,
It is assumed that the terminals 7, 8, 9 having subaddresses 11, 12, 13 are connected to the third interface (port P3) on the extension side. When the outside line terminal wants to communicate with the terminal 2 having the sub address 12 of the port P1, the outside line terminal sets a value (1 in this case) for identifying the port and the sub address 12 of the terminal 2 in the destination ISDN sub address and sets up the setup message. SM1 is transmitted (value becomes 112). Upon receiving the setup message SM1 from the network 20, the terminal management device 22 looks at the destination ISDN sub-address, and checks the destination ISDN sub-address 12 for the port P1.
The setup message SM of

In the same way, the extension terminal 8 (the terminal having the sub address 12 of the port P3) is connected to the extension terminal 2 (the port P1).
Of the sub-address 12 of the sub-address 12), the originating terminal 8 sets up the setup message S in which the destination ISDN number is set to port number 1 and the destination ISDN sub-address is set to 12.
Either M2 is sent out, or the setup message SM1 in which the port number 1 and the subaddress 12 are set in the destination ISDN subaddress is sent out.

From the received setup message, the terminal management device 22 determines the port number from the destination ISDN number, and sends the setup message SM of the destination ISDN subaddress 12 to the port P1.
In this case, the setup message SM1 sends the setup message SM of the destination ISDN subaddress 12 to the port P1. Whichever method is used, the identification of the destination terminal is based on the ISDN set by the originating terminal.
It is performed according to the contents of the sub address.

[0009]

As described above, the ISDN subaddress must be used when performing communication by identifying one of the terminals that are multi-drop connected to one interface. Therefore, the calling terminal must be used. Will set the ISDN subaddress and send a setup message.

However, when an extension terminal normally makes a call to the extension terminal, it is convenient to use the extension number assigned to each extension terminal. Since this corresponds to the ISDN number in ISDN, it is desirable to identify the called terminal by the ISDN number in order to realize the same operating environment as the conventional terminal management device.

Further, when the sub address is used as the extension number, when changing the extension number, the sub address registered in the extension terminal must be changed.

[0012]

According to the present invention, a table in which an extension number assigned to each of a plurality of terminals to be connected, a subaddress, and a port number to which the terminal is connected, a terminal and an outside line are associated with each other. From the setup message sent from the caller, the means to identify whether the caller and callee are internal or external, the means to detect the extension number of the callee terminal to be connected according to whether it is an extension or an external line, and the caller from the extension number Applies a means for referencing the table for identifying the sub-address of the extension terminal and the number of the port on which the destination extension terminal is accommodated, and a setup message including the sub-address identified for calling the destination extension terminal. Means for sending to the port to identify the destination extension terminal, and if the originating side is an external line, the ISDN server in the received setup message. Carried out with the information that is included in the address,
When the calling side is an extension, the extension number information included in the ISDN number in the received setup message is used.

[0013]

The terminal management device according to the present invention detects the extension number of the destination terminal from the setup message from the external line or extension, and refers to the table to identify the sub address and port number of the destination terminal. The extension number of the destination terminal is detected by using the destination ISDN subaddress in the case of an incoming call from the outside line and by using the destination ISDN number in the case of a call incoming from the extension line. The terminal management device sends a setup message including the identified subaddress to the connected port of the destination terminal.

The terminal which has received the setup message judges that the destination ISDN subaddress included in this message is equal to the subaddress stored in itself,
Judge that the own terminal is called. The other terminals determine that their own terminal has not been called because the destination ISDN subaddress included in the setup message is different from the subaddress stored therein.

[0015]

FIG. 1 is a block diagram of an embodiment of the present invention. FIG. 2 is a conversion table of extension numbers, port numbers, and subaddresses of each terminal.

In FIG. 1, a terminal management device 22 is connected between a network 20 and terminals 1 to 9 and terminals 1 and 12 having subaddresses 11, 12 and 13 are provided at an extension port P1.
2,3, sub-address 11,1 to the port P2 on the extension side
It is assumed that terminals 4, 5 and 6 having terminals 2 and 13 and terminals 7, 8 and 9 having sub addresses 11, 12 and 13 are connected to the port P3 on the extension side. When the outside line terminal wants to communicate with the terminal 2 having the sub address 12 of the port P1, the outside line terminal sets the extension number 120 to the destination ISDN sub address and sends out the setup message SM4.
Upon receiving the setup message SM4 from the network 20, the terminal management device 22 refers to the conversion table of FIG. 2 provided therein, and from the extension number in the called ISDN subaddress, the called terminal is connected to the port P1 by the subaddress. It identifies the terminal 2 of 12 and sends the setup message SM of the destination ISDN subaddress 12 to the port P1.

Similarly, when the extension terminal 8 (the terminal having the sub address 12 of the port P3) makes a call to the extension terminal 2 (the terminal having the sub address 12 of the port P1), the calling terminal 8 sets the extension number 120 as the destination ISDN number. Then, the setup message SM3 is transmitted. The terminal management device 22 refers to the conversion table of FIG. 2 and confirms from the extension number in the destination ISDN number of the received setup message SM3 that the destination terminal is the terminal 2 of the sub address 12 connected to the port P1. Identify and receive IS for port P1
The setup message SM of the DN sub address 12 is transmitted.

Table 1 below is an example of conversion processing in the terminal management device.

[0019]

[Table 1]

The conversion of the originating ISDN address is performed as follows. If the calling side is an outside terminal and the receiving side is an inside terminal, no conversion processing is performed. This corresponds to step a in the flowchart of FIG.

When the calling side is the extension terminal and the receiving side is the extension terminal, the subaddress of the calling side terminal is converted into the extension number of the calling side terminal by the table, and the result is set to the ISDN number. This corresponds to step b in the flowchart of FIG.

When the calling side is the extension terminal and the receiving side is the outside line terminal, the subaddress of the calling side terminal is converted into the extension number of the calling side terminal by the table, and the result is set to the ISDN subaddress. This corresponds to step c in the flowchart of FIG.

The conversion of the destination ISDN address is performed as follows. When the calling side is an outside line terminal and the receiving side is an extension terminal, the extension number of the ISDN subaddress is converted into the subaddress of the receiving side terminal, and the result is set in the ISDN subaddress. This corresponds to step a-1 in the flowchart of FIG.

When the originating side is the extension terminal and the terminating side is the extension terminal, the extension number of the ISDN number is converted into a subaddress of the extension terminal, and the result is set in the ISDN subaddress. This corresponds to step b-1 in the flowchart of FIG.

If the originating side is an internal terminal and the terminating side is an external terminal, the ISDN number and the ISDN subaddress are not converted. This corresponds to step c-1 in the flowchart of FIG.

FIG. 3 is a rewrite of the above-mentioned Table 1 into a flowchart. Details of each step are described in each frame.

[0027]

According to the present invention, the destination extension terminal is identified in the setup message by using the subaddress set in the terminal. However, from the perspective of the originating terminal, the extension number managed by the terminal management device is used. Appears to identify the receiving terminal. With this, in the case of communication between an external line terminal and an internal line terminal, the external line terminal can specify the incoming side terminal by the ISDN sub-address, and in the case of communication between the internal line terminal and the internal line terminal, the internal line terminal specifies the incoming side terminal by the ISDN number. Therefore, the operating environment can be the same as that of the conventional terminal management device.

The terminal management device of the present invention uses the correspondence table of the extension number of each terminal, the port number to which the terminal is connected, and the subaddress of the terminal to determine the ISDN number and the IDN number.
The SDN subaddress is converted. Therefore, when changing the extension number of the terminal, it is only necessary to change the table in the terminal management device, and it is not necessary to rewrite the sub-address stored in each terminal.

[Brief description of drawings]

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

FIG. 2 is a table of an example of a conversion table.

FIG. 3 is a flowchart showing conversion types of ISDN addresses.

FIG. 4 is a configuration diagram of a terminal connected to ISDN.

FIG. 5 is an enlarged view of a conventional example after DSU.

FIG. 6 is a block diagram of a conventional example when the number of extension terminals is increased.

[Explanation of symbols]

1, 2, 3, 4, 5, 6, 7, 8, 9 Terminal 22 Terminal management device P1, P2, P3 Port SM, SM1, SM2, SM3, SM4 Setup message

Claims (1)

[Claims] 1. A table that associates extension numbers and sub-addresses assigned to each of a plurality of connected terminals with the numbers of the ports to which the terminals are connected, and from a setup message sent from the terminals and external lines. Means for identifying whether the destination side and the destination side are internal or external, means for detecting the extension number of the destination terminal to be connected depending on whether it is an extension or an external line, the subaddress of the destination extension terminal from the extension number and the destination extension terminal Means for referencing the table to identify the number of the port in which is accommodated, and means for sending a setup message including the identified subaddress to call the terminating extension terminal to the corresponding port,
The destination extension terminal is identified by the information contained in the ISDN subaddress in the received setup message if the originating side is an external line, and by the extension number information contained in the ISDN number in the received setup message if the originating side is an extension. A terminal management device for connecting between terminals and between an external line and terminals.