JP2605861B2 - Private branch exchange - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a private branch exchange connected to an integrated services digital network (ISDN) line.

2. Description of the Related Art In general, a channel used for an ISDN line is roughly composed of an information channel such as a B channel and an H channel, and control information such as a D channel for realizing communication using the information channel.

FIG. 4 shows a conventional configuration in which a private branch exchange and an ISDN line are connected.

In FIG. 4, 1 is a private branch exchange (PBX) and 2 is
A line terminal unit (DSU) 3 connected between the private branch exchange 1 and the ISDN line is connected to the private branch exchange 1 as an extension.
A line maintenance device connected between the private branch exchange 1 and the ISDN terminal device 3 for monitoring the state of the line;
5 is provided with an interface conforming to the provisions of the INS network,
A line maintenance device connected between the private branch exchange 1 and the ISDN terminal device 3 for directly monitoring the state of the line.

 Next, the operation of the above conventional example will be described.

In FIG. 4, the private branch exchange 1 has a line terminating device 2, an IS
When the control command of the D channel is exchanged with the DN terminal device 3 based on the INS network regulation, the line maintenance devices 4 and 5 monitor and analyze the control command respectively, and the call sequence is normally performed. Monitor whether this is being done.

However, since the conventional line maintenance devices 4 and 5 are directly connected to the line and monitor the exchange of D-channel control commands, an interface conforming to the INS network rules is required. There is another problem that the private branch exchange 1 cannot control the line maintenance devices 4 and 5.

Furthermore, since the line maintenance devices 4 and 5 are independent devices, there is a problem that they do not operate in the event of a power failure.

The present invention has been made in view of the above-described conventional problems, and has as its object to provide a private branch exchange in which an interface conforming to the provisions of the INS network is not required for a line maintenance device, and the line maintenance device can operate even during a power failure. I do.

Means for Solving the Problems To achieve the above object, the present invention provides an ISDN line including a signal of an information channel and a signal of a control channel based on INS network rules, and a plurality of ISDN line terminal devices. The private branch exchange body to be exchanged and connected, and housed in the private branch exchange body, the exchange connection is performed in accordance with the INS network rule, and the INS network rule for line monitoring is defined by the private branch exchange body rule. An interface for converting and outputting to a line, and a line maintenance device which receives a control command from an output signal of the interface, monitors whether or not the call sequence is normal, and receives power supply from this interface. It is.

Further, the line maintenance device in the private branch exchange of the present invention,
A configuration in which a control command is input from the output signal of the interface to monitor whether the call sequence is normal, and the state of the ISDN line is directly monitored by controlling the input / output of an internal storage device. It was made.

Operation The present invention allows the private branch exchange and the line maintenance device to be connected to each other with the above-described configuration. Therefore, it is not necessary to directly connect the line maintenance device to the line. It becomes unnecessary.

According to the present invention, since the control signal and the power are supplied to the line maintenance device according to the above configuration, the line maintenance device can operate even at the time of a power failure.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram showing an embodiment of a private branch exchange according to the present invention, FIG. 2 is a block diagram showing a detailed configuration of the INS interface unit of FIG. 1, and FIG. FIG. 2 is a block diagram illustrating a detailed configuration of a line maintenance device.

In FIG. 1, reference numeral 6 denotes a private branch exchange (PBX) having INS interface units (I / F) 11 and 12, and reference numeral 7 denotes a line terminal connected between the INS interface unit 11 of the private branch exchange 6 and an ISDN line. The devices (DSU), 8 are ISDN terminal devices connected to the INS interface unit 11 as extensions of the private branch exchange 6.

Reference numeral 9 denotes a line maintenance device connected to the INS interface unit 11 of the private branch exchange 1 to monitor the state of the line. Reference numeral 10 denotes an INS interface unit 1 of the private branch exchange 1.
This is a line maintenance device that is connected to 2 and directly monitors the state of the line.

In Figure 2, INS interface unit (I / F)
The control units 13 and 12 are connected to a central control unit (not shown) of the private branch exchange 6 and perform control as described later.
And an input / output unit 14 for connecting a line termination device 7, an ISDN terminal device 8 to a switching system such as a trunk of the private branch exchange 6, and an input / output unit 15 for connecting to line maintenance devices 9 and 10. Have been.

In FIG. 3, the line maintenance devices 9 and 10 are IN
It is roughly composed of an input / output unit 16 for connecting to the S interface units 11 and 12, a storage device 17 for storing control commands and control information thereof, and a control unit 18 for performing control as described later.

 Next, the operation of the above embodiment will be described.

In FIG. 1 to FIG. 3, D
The exchange of channel control commands is performed between the private branch exchange 6 and the line terminating device 7 via the input / output unit 14 of the INS interface unit 12, or the private branch exchange 6 and the ISDN terminal device 8 via the INS interface unit 11. The control unit 13 of the INS interface units 11 and 12 respectively transmits the exchanged commands to the input / output unit 15
Is output to the line maintenance devices 9 and 10 via the.

In the line maintenance devices 9 and 10, this command is
The controller 18 analyzes the command and stores the command in the storage device 17.

In the INS interface units 11 and 12, the control unit 13 outputs control signals such as start and stop and power to the line maintenance devices 9 and 10 via the input / output unit 15 to control the line maintenance devices 9 and 10, respectively. I do.

Therefore, according to the above embodiment, the line maintenance device 9,
Since the command is input from the INS interface units 11 and 12, the interface 10 does not require an interface conforming to the rules of the INS network, and the line maintenance devices 9 and 10 can operate even during a power failure.

Effect of the Invention As described above, the present invention has an interface for inputting / outputting a D-channel control command of an ISDN line to / from a line maintenance device and supplying a control signal and power to the line maintenance device. Therefore, there is no need to connect the line maintenance device directly to the line, so that an interface conforming to the INS network rules is not required for the line maintenance device, and the line maintenance device can operate even during a power failure. .

Further, the line maintenance device in the private branch exchange of the present invention,
A control command is input from the output signal of the interface to monitor whether the call sequence is normal, and the state of the ISDN line can be directly monitored by controlling the input / output of the internal storage device. This has the effect that the private branch exchange can be accurately monitored.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a private branch exchange according to the present invention, FIG. 2 is a block diagram showing a detailed configuration of the INS interface unit of FIG. 1, and FIG. And FIG. 4 is a block diagram showing a conventional configuration in which a private branch exchange and an ISDN line are connected. 6… Private branch exchange, 9,10 …… Line maintenance equipment, 11,12 …… I
NS interface unit (I / F), 13,18 ... Control unit,
14,15,16 ... I / O unit, 17 ... Storage device.

Claims (2)

(57) [Claims] 1. A private branch exchange main unit for exchange-connecting an ISDN line including a signal of an information channel and a signal of a control channel based on the provisions of an INS network, and a plurality of ISDN terminal devices, and housed in the private branch exchange main unit. , The exchange connection is the IN
An interface that converts the INS network rules into the rules of the private branch exchange itself for line monitoring and performs control based on the output signals of this interface. A private branch exchange that includes a line maintenance device that monitors whether a call sequence is normal and receives power supply from this interface. 2. The line maintenance device according to claim 1, wherein a control command is input from an output signal of the interface to monitor whether the call sequence is normal or not and to directly monitor the state of the ISDN line. The private branch exchange described in parentheses.