JPH05260183A - Isdn circuit state display system - Google Patents

Abstract

PURPOSE:To allow a user to recognize a state of an ISDN circuit, in the case a telephone exchange equipment and a terminal equipment are connected in a multi-state to one piece of ISDN circuit. CONSTITUTION:A display panel 6 is connected in a multi-state to ISDN circuits (RA, RB, TA, TB). A microprocessor 605 of the display panel 6 always monitors a D channel of the ISDN circuit, and discriminates a use state of B1 and B2 channels. When the B1 or the B2 channel is being used, an indicator 610 or 611 is turned on and a use state of the ISDN circuit is displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ISDN line status display device for displaying the status of a line (ISDN line) from an ISDN network.

[0002]

2. Description of the Related Art FIG. 5 shows a terminal device (DT) connected to an ISDN network 1.
It is a block diagram which shows the state which is connecting E1, DTE2, ... DTEm) 5.

In FIG. 5, reference numeral 2 denotes a data service unit (DS) for connecting a terminal device 5 to an ISDN line.
U). As shown in the figure, the terminal device 5 can be connected to one (one line) ISDN line in m units (e.g., eight units). As a result, IS from any terminal device 5 of DTE1 to DTEm
A call can be made to the DN network 1.

FIG. 6 is a block diagram showing a connection example showing an application of the configuration shown in FIG. In FIG. 6, ISDN
The line is connected to a telephone exchange (PBX) 3 via a data service unit 2. A plurality of terminal devices 5 are connected to the line connecting the telephone exchange device 3 and the data service unit 2 in multiple. Telephone exchange 3
Accommodates a plurality of extension terminal devices (EXT1 ... EXTn) 4, and these extension terminal devices (EXT1)
... EXTn) 4 can make a call to the ISDN network 1 via the telephone exchange 3 and the data service unit 2.

[0005]

As described above, when multiple telephone exchanges and terminal devices are connected to one ISDN line, the extension terminal device passes through the telephone exchange device and the data service unit. Even if the ISDN line is in use and the user of the terminal device is in communication with the ISDN network, the user cannot recognize it, resulting in useless calling operation.

On the contrary, when the terminal device is communicating through the ISDN line, the extension terminal device is
When a call is made to the network, a busy tone is sent to the extension terminal device. However, the operator asks if the other party is busy.
There was a problem that it could not recognize if the line was busy.

The present invention solves the above-mentioned problems and uses the telephone switching apparatus and the terminal apparatus when the telephone switching apparatus and the terminal apparatus are multi-connected to one ISDN line. It is an object of the present invention to provide an ISDN line status display method for allowing a person to recognize the state of the ISDN line.

[0008]

The present invention provides a single ISD.
A telephone switching device, a terminal device, and a state detecting device for detecting the state of an ISDN line are connected to the N line in a multi-connection I
In the SDN line status display system, the status detecting device extracts a D channel in the ISDN line and monitors it, and an IS monitor according to the monitor information from the monitor means.
It is characterized in that it is provided with an identification means for identifying the usage state of the DN line and a display means for displaying the usage state of the ISDN line identified by the identification means.

[0009]

With the above-mentioned structure, when the telephone switching apparatus and the terminal device are multi-connected to one ISDN line, the user of the telephone switching apparatus and the terminal device can be
The state of the SDN line can be recognized at a glance.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a relay system diagram showing the configuration of the present invention.

In FIG. 1, 1 is an ISDN network and 2 is an ISDN.
A subscriber line terminating device (DSU) for terminating a subscriber line (ISDN line) of the DN network, 3 is a telephone exchange device (PBX) for accommodating an ISDN line via the subscriber line terminating device 2, 4
Is an extension terminal device (EXT1) accommodated in the telephone exchange device 3.
... EXTn), 5 through I via the subscriber line termination device 2
Terminal devices (DTE1, DTE) connected to the SDN line
2, ... DTEm-1), 6 are display boards (DS) for detecting the state of the ISDN line and displaying the detected state (state of the ISDN line). In this embodiment, the ISDN line is used as the ISDN basic interface, and therefore the ISDN line has a 2B + D configuration.

As shown in the figure, the telephone exchange 3 and the terminal devices (DTE1, DTE2,
... DTEm-1) 5 are connected in multi.
In addition, the display board 6 is also connected to the multi.

FIG. 2 shows in more detail the connection state of the subscriber line terminating device 2, the telephone exchange 3 and the display panel 6 of the relay system diagram shown in FIG. 1, and further shows the bird structure of the display panel 6. FIG.

The subscriber line terminating device 2 and the telephone switching device 3 are transmission lines (TA, TB) for transmitting data from the telephone switching device 3 and receiving lines (RA, RB) for receiving data from the telephone switching device 3. ) And are tangent to.

In the display panel 6, 601 is an interface for matching physical and electrical conditions, a receiver for pulling in transmission lines (TA, TB) and reception lines (RA, RB), and 602 is data from the receiver 601. Interface for converting the data into parallel, 603 is an HDLC controller for controlling the HDLC protocol, 605 is a microprocessor (MP for controlling the entire display panel 6
U), 606 includes a LAPD control, and a fixed storage device (ROM) in which the microprocessor 605 stores the firmware for controlling the display panel 6; and 607, when the microprocessor 605 performs the processing for controlling the display panel 6. Storage device (RA
M), 604 is a bus for transmitting and receiving control data between the HDLC controller 603, the microprocessor 605, the fixed storage device 606, and the temporary storage device 607;
Reference numeral 8 is connected to the bus 604, and under the control of the microprocessor 605, a latch for temporarily holding status information indicating the usage status of the ISDN line, 610 is an ISDN
An indicator (A) for displaying the usage status of the B1 channel of the line, a reference numeral 611 for displaying the usage status of the B2 channel of the ISDN line (B), and a reference numeral 609 are connected to the latch 608 and held by the latch. It is a driver for lighting or extinguishing the display unit (A) 610 and the display unit (B) 611 based on the status information.

The operation in FIG. 2 will be described below.

The microprocessor 605 includes a receiver 6
01, the S interface 602, and the HDLC controller 603 to monitor the D channel on the ISDN line. Here, for example, when the B1 channel is used, a call setting operation is performed by a predetermined protocol to set a call of the B1 channel on the D channel.

Microprocessor 605 then recognizes the call setup operation and identifies that the B1 channel is in use. The microprocessor 605 then takes the bus 6
The state information indicating that the B1 channel is in use is set in the latch 608 via 04.

Then, the driver 609 turns on the lamp (A) according to the state information set in the latch 608,
Indicates that the B1 channel is in use.

Next, when the communication of the B1 channel is completed,
In order to disconnect the call of the B1 channel on the D channel, a call disconnection operation is performed by a predetermined protocol.

Microprocessor 605 then recognizes the call disconnect operation and identifies that the B1 channel is empty. The microprocessor 605 then takes the bus 604.
The state information indicating that the B1 channel is empty is set in the latch 608 via the.

Then, the driver 609 turns off the lamp (A) 610 according to the status information set in the latch 608, and indicates that the B1 channel is empty.

As described above, the usage status of the ISDN line can be displayed, and the user can be made aware of the usage status in advance.

Although the above description has been made only for the B1 channel, it is clear that this is also done for the B2 channel. In this case, the lamp (B)
The use state is displayed by turning on or off 611.

Next, the second embodiment will be described.

FIG. 3 is a relay system diagram showing the configuration of the second embodiment of the present invention.

3 is different from the relay system diagram shown in FIG. 1 in that instead of the display panel 6, a line monitoring device (LS) 7 for monitoring the state of the ISDN line is provided, and the line monitoring device 7 is exchanged by telephone. It is connected to the device 3.

FIG. 4 shows in more detail the connection state of the subscriber line terminating device 2, the telephone exchange device 3, the line monitoring device 7 and the terminal device (DTE1) 5 in the relay system diagram shown in FIG. 3 is a block diagram showing a configuration of a telephone exchange device 3 and a hardware configuration of a line monitoring device 7. FIG.

In the telephone exchange device 3 of FIG. 4, 31 is a speech path switch (SW), 32 is a speech path switch, and a trunk (CO) connected to the subscriber line terminating device 2 is connected.
T), 33 are line circuits (LIN) that are housed in the speech path switch 31 and control the extension terminal devices (EXT1 ... EXTn) 4, and 35 is a central control unit (CPU) that controls the entire telephone exchange device 3. , 36 are storage devices (M, M) for storing control programs of the central control device 35, station data, and the like.
M), 37 are LS interface devices (IF) for interfacing with the line monitoring device 7, and 34 is a bus.
The bus 34 has a speech path switch 31, a central controller 35,
A storage device 36 and an LS interface device 37 are connected, and control data between these devices are transmitted and received via a bus 34.

Further, in the line monitoring device 7, 71 is an interface for matching physical and electrical conditions, which is a transmission line (TA, TB) and a reception line (RA, R).
B) is a receiver for drawing in, 72 is an S interface for converting data from the receiver 71 into parallel, and 73 is for H
HDLC controller for controlling DLC protocol, 7
5 is a microprocessor for controlling the entire line monitoring device 7, 76 is LAPD control, and the microprocessor 7
Reference numeral 5 is a fixed storage device (ROM) storing firmware for controlling the line monitoring device 7, and 77 is a temporary storage for temporarily storing data generated when the microprocessor 75 performs the process of controlling the line monitoring device 7. Storage device (R
AM), 78 is a PBX interface device (PBX IF) for interfacing with the telephone exchange device 3, 74
Is the HDLC controller 73, the microprocessor 7
5, fixed storage device 76, temporary storage device 77, and PBX
A bus for transmitting and receiving control data between the interface devices 78

The operation in FIG. 4 will be described below.

The microprocessor 75 includes a receiver 7
The D channel on the ISDN line is monitored through the S1, S interface 72, and HDLC controller 73. Here, for example, when the terminal device (DTE1) 5 communicates with the B1 channel, a call setting operation is performed with a predetermined protocol to set a B1 channel call on the D channel.

Microprocessor 75 then recognizes the call setup operation and identifies that the B1 channel is in use. The microprocessor 75 then sends via the bus 74 to the PBX interface device 78 status information indicating that the B1 channel is busy.

On the other hand, the telephone exchange device 3 sends the IS sent by the line monitoring device 7 via the LS interface device 37.
The status information of the DN line is received and stored in the storage device 36.

When the communication on the B1 channel is completed, the microprocessor 75 recognizes it and sends the status information to the telephone exchange 3 via the PBX interface device 78.

This is similarly performed for the B2 channel. Therefore, the telephone exchange 3 always uses ISDN.
Can recognize the line status.

As a result, for example, the terminal device (DT
E1) When the extension terminal device 4 makes a call using the ISDN line while 5 is busy using the B1 channel, the telephone switching device 3 immediately makes a call using the B2 channel of the ISDN line. Perform a call operation.

Further, the terminal device (DTE1) 5 has B1 and B
When the extension terminal device 4 makes a call using the ISDN line when a call is being made using both channels with
The telephone exchange device 3 immediately prompts the extension terminal device 4 to
A busy tone can be sent. The busy tone at this time may be a busy tone (second busy tone) of a different format from the busy tone (first busy tone) indicating that the other party is talking. it can. Therefore, this allows the caller to recognize that the call is lost when the terminal device exclusively uses the ISDN line.

Further, if the extension terminal device is a so-called multi-function telephone provided with a display, the reason for the call loss can be displayed in characters on the display to improve the operability for the user. Is possible.

Although FIG. 3 and FIG. 4 disclose the case where the line monitoring device 7 is configured independently, the function of the line monitoring device 7 can be put in the trunk 32. According to this, it is clear that the object of the present invention can be achieved with a simpler configuration.

[0042]

According to the present invention, when the telephone switching apparatus and the terminal device are multi-connected to one ISDN line, the user of the telephone switching apparatus and the terminal device is in the state of the ISDN line. Can be recognized and the serviceability to the user can be improved.

[Brief description of drawings]

FIG. 1 is a relay system diagram showing a configuration of the present invention.

FIG. 2 is a block diagram showing a configuration of the present invention.

FIG. 3 is a relay system diagram showing a configuration of a second exemplary embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a second exemplary embodiment of the present invention.

FIG. 5 is a diagram showing an example of connection to an ISDN line.

FIG. 6 is a relay system diagram showing a conventional configuration.

Claims (1)

[Claims] 1. An ISDN line status display system in which a telephone switching device, a terminal device, and a status detection device for detecting the status of an ISDN line are connected to one ISDN line in a multiple manner. , Monitoring means for extracting the D channel in the ISDN line, identification means for identifying the use state of the ISDN line by the monitor information from the monitor means, and display means for displaying the use state of the ISDN line identified by the identification means ISDN characterized by having
Line status display method.