JPH0795267A - Line connection system - Google Patents

Abstract

PURPOSE:To transmit internal information, to diagnose the line connection device of an opposite station and to easily grasp fault conditions by mutually transmitting and receiving special codes. CONSTITUTION:At the time of a diagnostic mode, a control part 20 performs changeover from a code transmission part 22 to the transmission part 26 by a selector 211 and transmits a code for starting at the time of transmitting the internal information. In the opposite station 4, when the code for starting is detected in a code detection part 37, the control part 310 is informed. The control part 310 performs the changeover from the code transmission part 32 to 36 by the selector 311, encodes the various kinds of fault information from an internal information part 38 and transmits them through an U/B conversion part 33 to the opposite station 2. In the device 2, the internal information is gathered in an internal information processing part 29 and a result is transmitted to the control part 20. Thus, the faults of a called station side device, a terminal equipment and a cable, etc., can be diagnosed mutually between the opposite stations.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line connection system, and more particularly to a line connection system capable of diagnosing a line connection device of an opposite station.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram showing an example of a conventional line connection system.

Referring to FIG. 2, in the line connection system of this example, the main station side line connection device 6 accommodating the terminal device 1 and the slave station side line connection device connected to the main station side line connection device 6 and the network 3 are connected. 7 and the slave station side line connection device 7 accommodates the terminal device 5.

The master station side line connection device 6 has an interface section 61 for connecting to the terminal device 1 and a code transmission section for coding the signal from the interface section 61 and transmitting it to the slave station side line connection apparatus 7 through the network 3. 62, a code detector 65 for detecting a code sent from the slave station side line connection device 7 through the network 3, a U / B converter 63 for converting a unipolar signal into a bipolar signal, and a bipolar signal into a unipolar signal. And a B / U converter 64 for

Similarly, the slave station side line connection device 7 encodes the interface section 71 for connecting to the terminal unit 5 and the signal from the interface section 71 and sends it to the master station side line connection apparatus 6 through the network 3. Code sending unit 72
A code detector 75 for detecting a code sent from the main station side through the network 3, a U / B converter 73 for converting a unipolar signal into a bipolar signal, and a B / U converter for converting a bipolar signal into a unipolar signal. And a conversion unit 74.

Next, the operation of this example will be described.

In the main station side line connection device 6, the signal from the terminal device 1 is coded by the code transmission part 62 through the interface part 61, and the unipolar signal is converted into a bipolar signal by the U / B conversion part 63 and the network 3 Send to.

In the slave station side line connection device 7, the bipolar signal from the network 3 is converted into a unipolar signal by the B / U conversion section 74, and the code detection section 75 is converted from this unipolar signal.
The code detected in step 1 is sent from the interface unit 71 to the terminal device 5.

On the contrary, the signal from the terminal device 5 of the slave side line connection device 7 is sent to the network 3 through the interface unit 71, the code sending unit 72 and the U / B converting unit 73.
In the main station side line connection device 6, the code detection unit 65 detects a code from the unipolar signal from the B / U conversion unit 64,
It is sent to the terminal device 1 through the interface unit 61.

[0010]

In this conventional line connection system, the local station only exchanges data with the opposite station, which causes a failure on the terminal side of the opposite station line connecting device.
There is a problem in that the local station cannot know the abnormality of the interface cable, the abnormality of the interface signal, and the failure content of the line connection device itself, and can only grasp the abnormality of the opposite station.

An object of the present invention is to provide a line connection system capable of diagnosing an opposite station line connection device by transmitting internal information by transmitting and receiving a special code.

[0012]

According to the present invention, an interface section for connecting to a terminal device, a first code sending section for coding a signal from the interface section and sending the coded signal to an opposite station, A first code detection unit for detecting a code sent from the opposite station, a U / B conversion unit for converting a unipolar signal into a bipolar signal, and a B / U conversion unit for converting a bipolar signal into a unipolar signal, respectively. In a line connection system configured by connecting the provided line connection devices to each other through a network, the line connection device of the own station is provided with a diagnostic means for diagnosing the line connection device of the opposite station based on coded internal information. A line connection system characterized by

Also, the own station sends a second code sending unit for sending a starting code for sending the internal information of the own station line connection device to the opposite station, and the starting from the opposite station. A second code detection unit for detecting a code for use, an internal information transmission unit for transmitting internal information for performing the diagnosis, an internal information processing unit for processing internal information transmitted from the opposite station, and There is provided a line connection system characterized by comprising a control unit for performing sequence control of each unit in the station line connection device.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the line connection system of the present invention.

Referring to FIG. 1, the line connection system of the present embodiment includes a local line connection device 2 in which a terminal device 1 is accommodated,
The opposite station line connecting device 4 connected to the own station line connecting device 2 through the network 3
The terminal device 5 is housed in.

The local station line connection device 2 includes an interface unit 21 for connecting to the terminal device 1, a first code transmission unit 22 for transmitting a code to the opposite station line connection device 4, and the opposite station line connection device 4. And a first code detecting section 25 for detecting the code of U and the unipolar signal sent from the code sending section 22 is converted into a bipolar signal and sent to the network 3.
A / B converter 23, a B / U converter 24 for converting a bipolar signal sent from the network 3 into a unipolar signal and sending it to the code detector 25, an opposite station line connection device 4, and a local station line connection device. A second code sending unit 26 that sends a starting code for sending internal information of the second terminal 2 and a second code detecting unit 27 that detects the starting code from the opposite station.
An internal information sending unit 28 that sends internal information for performing diagnosis on the opposite station side, an internal information processing unit 29 that collects and processes the internal information sent from the opposite station, and the local station line connection device 2 The control unit 2 for performing sequence control of the internal interface unit 21, the code transmission units 22 and 26, the code detection units 25 and 27, the internal information transmission unit 28, and the selector 211.
10, and a code sending unit 22 according to an instruction from the control unit 210,
Select one of the code sending units 26 to select the U / B conversion unit 2
3 and a selector 211 connected to it.

Similarly, the opposite station line connection device 4 has an interface unit 31 connected to the terminal device 5, and a first code transmission unit 32 for transmitting a code to the own station line connection device 2.
A first code detecting section 35 for detecting a code from the local station line connecting device 2, and a U / B converting section 33 for converting the unipolar signal sent from the code sending section 32 into a bipolar signal and sending it to the network 3. , A B / U converter 34 for converting a bipolar signal sent from the network 3 into a unipolar signal and sending it to the code detector 35, and internal information of the opposite station line connecting device 4 to the own station line connecting device 2. A second code sending unit 36 that sends a starting code for sending and a second code detecting unit 37 that detects the starting code from its own station.
An internal information transmitting unit 38 that transmits internal information for performing diagnosis on the local station side, an internal information processing unit 39 that collects and processes internal information transmitted from the local station, and an opposite station line connection device. 4, the interface unit 31, the code sending units 32 and 36, the code detecting units 35 and 37, the internal information sending unit 38, the control unit 310 that controls the sequence of the selector 311 and the code sending unit 3 according to an instruction from the control unit 310.
2, a selector 311 for selecting any one of the code sending units 36 and connecting to the U / B converting unit 33.

Next, the operation of this embodiment will be described.

Usually, the data from the terminal device 1 is sent to the code sending unit 22 through the interface unit 21, and the selector 211 causes the code sending unit 2 to operate according to an instruction from the control unit 210.
2 is connected to the U / B converter 23.

The U / B converter 23 converts the unipolar signal into a bipolar signal and then sends it to the opposite station line connecting device 4 through the network 3.

In the opposite station line connection device 4, the B / U converter 34 converts the signal again into a unipolar signal, and then the code detector 35 sends it to the terminal 5 via the interface 31.

On the other hand, the data from the terminal device 5 is sent to the code sending unit 32 through the interface unit 31, is converted into a bipolar signal by the U / B conversion unit 33 through the selector 311, and is then connected to the local station line connection device through the network 3. 2 is sent.

In the local station line connection device 2, the B / U converter 2
After being converted into a unipolar signal again in 4, it is sent from the code detection unit 25 to the terminal device 1 via the interface unit 21.

In the present embodiment, in addition to the above-mentioned operation as the line connection device, the internal information of the opposite station line connection device is transmitted by sending a special code from the own station line connection device to the opposite station line connection device. Can be received by the local station line connection device, and the local station can know the state of the opposite station.

Therefore, it is possible to diagnose the opposite station line connecting device with the own station line connecting device.

The operation will be described below.

First, the local station line connection device 2 clamps the interface part 21 by the control part 210 and the code sending part 2 by the selector 211 in the diagnostic mode.
The code for detecting the signal from the opposite station line connection device 4 is detected by the code detecting section 27 by transmitting the activation code for switching from 2 to the code transmitting section 26 and transmitting the internal information.

In the opposite station line connection device 4, the code detection section 35 and the code detection section 37 simultaneously detect the code from the unipolar signal from the B / U conversion section 34.

When the activation code for transmitting its own internal information is transmitted from the local station line controller 2, the code detection unit 37 detects this activation code, and the control unit 310 detects the detection. Notify to.

Upon receiving this notification, the control unit 310 clamps the interface unit 31, and the selector 311 causes the code transmission unit 32 to the code transmission unit 36.
Then, the internal information sending unit 38 is activated.

The internal information sending unit 38 outputs internal information such as a failure of the terminal device 5 connected to its own line connection device 4, an error of the interface cable, an error of the interface signal, and error information of the line connection device 4 itself. The code sending unit 36 codes the fault information from the internal information sending unit 38, converts it into a bipolar signal by the U / B converting unit 33, and then transmits this bipolar signal to the own line connection device via the network 3. Send to 2. After that, the control unit 310 returns each unit in the opposite station line connection device 4 to the normal operation.

In the local station line connection device 2, the B / U converter 2
4. The internal information processing unit 29 collects and processes the internal information of the opposite station line connection device 4 sent via the code detection unit 27, and sends the result to the control unit 210.

After receiving the information from the internal information processing unit 29, the control unit 210 returns each unit in the local station line connection device 2 to the normal state.

The operation of sending internal information from the local station line connecting device 2 to the opposite station line connecting device 4 is also the same as the above operation, and therefore its explanation is omitted.

As described above, in this embodiment, the special code is sent from the own station line connecting device 2 to receive the internal information of the opposite station line connecting device 4, or the special code is sent from the opposite station line connecting device 4 to send the special code. By receiving the internal information of the station line connection device 2, the failure of the terminal device connected to the line connection device of the opposite station side on the own station side or the own station side on the opposite station side, the abnormality of the interface cable, the interface It is possible to diagnose a signal abnormality or a failure of the line connection device itself.

[0037]

As described above, according to the present invention, a start-up code for transmitting internal information to a conventional line connection device,
By adding the function of diagnosing by transmitting and receiving internal information, it is possible to easily diagnose the state of the opposite station by diagnosing the opposite line connection device, so simply exchange data with the opposite station. Not only the line connection operation, but also the fault on the terminal side of the opposite station line connection device, the interface cable abnormality, the interface signal abnormality, the failure content of the line connection device itself can be known by the local station side Have an effect.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a line connection system of the present invention.

FIG. 2 is a block diagram showing an example of a conventional line connection system.

[Explanation of symbols]

 1, 5 Terminal device 2 Own station line connection device 3 Network 4 Opposite station line connection device 6 Main station side line connection device 7 Slave station side line connection device 21, 31, 61, 71 Interface unit 22, 26, 32, 36, 62 , 72 code sending unit 23, 33, 63, 73 U / B converting unit 24, 34, 64, 74 B / U converting unit 25, 27, 35, 37, 65, 75 code detecting unit 28, 38 internal information sending unit 29,39 Internal information processing unit 210,310 Control unit 211,311 Selector

Claims (2)

[Claims] 1. An interface unit for connecting to a terminal device, a first code sending unit for coding a signal from the interface unit and sending the code to an opposite station, and detecting a code sent from the opposite station. U / B for converting a unipolar signal into a bipolar signal
In a line connection system in which line connection devices each including a conversion unit and a B / U conversion unit for converting a bipolar signal into a unipolar signal are connected to each other through a network, the line connection device of the own station is coded. A line connection system comprising a diagnostic means for diagnosing the line connection device of the opposite station based on the obtained internal information. 2. A second code sending unit for sending a starting code for sending the internal information of the local station line connecting device to the opposite station, and the starting from the opposite station. A second code detecting section for detecting a code for use,
An internal information sending unit that sends internal information for performing the diagnosis, an internal information processing unit that processes internal information sent from the opposite station, and a control unit that performs sequence control of each unit in the local station line connection device. The line connection system according to claim 1, further comprising: