JPS5981949A - Data transmitter - Google Patents
Data transmitterInfo
- Publication number
- JPS5981949A JPS5981949A JP57192149A JP19214982A JPS5981949A JP S5981949 A JPS5981949 A JP S5981949A JP 57192149 A JP57192149 A JP 57192149A JP 19214982 A JP19214982 A JP 19214982A JP S5981949 A JPS5981949 A JP S5981949A
- Authority
- JP
- Japan
- Prior art keywords
- test code
- switching circuit
- data
- code
- interface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 claims description 20
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000002159 abnormal effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 238000004092 self-diagnosis Methods 0.000 description 3
- 238000003745 diagnosis Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は自己診断機能として試験符号発生器、試験符号
照合器を内蔵し、データ通信システムの試験を行うデー
タ伝送装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data transmission device that includes a built-in test code generator and a test code verifier as self-diagnosis functions, and tests a data communication system.
データ伝送装置は自己の用いられているシステムの試験
のため、内蔵の試験符号発生器及び試験符号照合器を動
作させ、システムのビット誤シを監視することにより、
システムの良否を判定することを行っている。この機能
は自己診断機能と称され、従来より用いられているが、
第１図を用いてその方法を説明する。In order to test the system in which the data transmission equipment is used, the data transmission equipment operates a built-in test code generator and test code verifier to monitor bit errors in the system.
It is used to judge the quality of the system. This function is called the self-diagnosis function and has been used for a long time.
The method will be explained using FIG.
データ端末装置（以降ＤＴＥと称す）ｌよジインターフ
エース入力線１−１を経由し、データ伝送装置（以降Ｄ
ＣＥと称す）２に送信符号が送出され１選択回路２−２
を経て変調器２−３に入り。The data terminal equipment (hereinafter referred to as DTE) is connected to the data transmission equipment (hereinafter referred to as DTE) via the interface input line 1-1.
A transmission code is sent to the 1 selection circuit 2-2 (referred to as CE).
and then enters modulator 2-3.
変調された信号が線路５によシ相手側ＤＣＥ３に到達し
、ＤＣＥ ３によシ復調され、ＤＴＥ４に供給される。The modulated signal reaches the other side DCE 3 via the line 5, is demodulated by the DCE 3, and is supplied to the DTE 4.
ここて選択回路２−２はＪ）ＴＥＩよシ入力した符号と
符号発生器２−１で発生した符号とを切替選択するもの
である。逆にＤＴＥ ４よシ送信された符号はＤＣＥ３
によシ変調され線路６を経由してＤＣＥ ２の復調器２
−４へ到達し復調された符号が選択回路２−５を経由し
、インターフェース出力線１−２を経てＤＴＥ １へ到
達する。Here, the selection circuit 2-2 switches and selects the code inputted from J) TEI and the code generated by the code generator 2-1. Conversely, the code sent by DTE 4 is DCE3.
demodulator 2 of DCE 2 via line 6.
-4 and the demodulated code passes through the selection circuit 2-5 and reaches the DTE 1 via the interface output line 1-2.
ここで選択回路２−５は復調符号をＤＴＥ ＩＯ方へ送
出するか、試験符号照合器２−６へ送出するか選択する
ものである。Here, the selection circuit 2-5 selects whether to send the demodulated code to the DTE IO direction or to the test code collation unit 2-6.
さて、データ伝送中に障害が発生した場合、障害発生か
所を探知して速かに復旧させる必要がある。この場合選
択回路２−２及び２−５を切替て。Now, when a failure occurs during data transmission, it is necessary to detect the location of the failure and quickly restore it. In this case, select circuits 2-2 and 2-5 are switched.
試験符号発生器２−（及び試験符号照合器２−６を各々
変調器２−３の入力側及び復調器２−４の出力側に接続
し、例えば自己の線路側にて自局へ向けて折返し７′！
ｉｌ−行うこと、相手ＤＣＥの線路側にて自局へ向けて
折返し８を行うこと、相手ＤＣＥの直３１ｒ、側にて自
局へ向けて折返し９を行うとと及び相手ＤＴＥの直流側
にて自局へ向けて折返し１０を行うことをそれぞれ実施
すれば、試験符号発生器２−１で発生した符号が試験符
号照合器２−６へ戻ってくることとなり、この照合器に
て符号誤シの有無を検出することによシ、１）ＣＥ２．
伝送路５または６．ＤＣＥ３．及びＤＣＥ３とＤ’ｌ’
Ｅ４間のいずれの障害であるか判定できる。The test code generator 2-(and the test code checker 2-6 are connected to the input side of the modulator 2-3 and the output side of the demodulator 2-4, respectively, and for example, on the own line side toward the own station. Turn around 7′!
What to do, make a turn 8 towards your own station on the line side of the other DCE, make a turn 9 towards your own station on the direct 31r side of the other DCE, and on the DC side of the other DTE. If the code generated by the test code generator 2-1 is returned to the test code verifier 2-6, the code generated by the test code generator 2-1 is returned to the test code verifier 2-6, and this verifier detects a code error. By detecting the presence or absence of CE2.
Transmission line 5 or 6. DCE3. and DCE3 and D'l'
It is possible to determine which fault occurs between E4.
しかし従来の構成ではＤＴＥ １方向へ試験符号を送出
できないため、ＤＴＥｌとＤＣＥ２間の診断が不可能で
あった。通常この個所はインターフェースケーブルで接
続されておシ、ケーブル自体の特性として、波形歪、温
償の現象が発生するため、データ伝送の障害要因となる
ことが多々あった。However, in the conventional configuration, a test code cannot be sent in the DTE 1 direction, making it impossible to diagnose between DTEl and DCE2. Normally, this point is connected with an interface cable, and due to the characteristics of the cable itself, waveform distortion and temperature compensation phenomena occur, which often causes problems in data transmission.
従って従来の構成ではかかる場合の障害要因が探知でき
ず、障害復旧が速やかに行なわれなかった。Therefore, in the conventional configuration, the cause of the failure in such a case could not be detected, and failure recovery could not be performed promptly.
本発明の目的は前記の欠点を排除し、ＤＴｆ！ニーＤＣ
Ｅ間の診断をも行えるようにしたデータ伝送装置を提供
することにある。The object of the present invention is to eliminate the above-mentioned drawbacks and to improve the DTf! Knee DC
An object of the present invention is to provide a data transmission device that can also perform diagnosis between E and E.
本発明のデータ伝送装置は、所定のデータ符号を発生さ
せる試験符号発生器と、前記データ符号と入力されたデ
ータ符号との相違を検出する試験符号照合器と、変調器
と、復調器と、前記試験符号発生器出力とデータ端末装
置からデータを入力するインターフェース入力線とのい
ずれか一方を選び前記変調器に接続する第一の切替回路
と、前記復調器出力を前記試験符号照合器へか前記デー
タ端末装置へデータを出力するインターフェース出力線
へかの一方を選び接続する第二の切替回路とを有するデ
ータ伝送装置において、前記インターフェース入力線と
前記第一の切替回路との接続を切離し、前記第二の切替
回路と前記インターフェース出力線との接続を切離し、
前記試験符号発生器の出力を前記インターフェース出力
線へ接続し、前記試験符号照合器入力を前記インターフ
ェース入力線に接続する回路を有することを特徴とする
。A data transmission device of the present invention includes a test code generator that generates a predetermined data code, a test code collation device that detects a difference between the data code and an input data code, a modulator, and a demodulator. a first switching circuit that selects either the test code generator output or an interface input line for inputting data from a data terminal device and connects it to the modulator; In a data transmission device having a second switching circuit that selectively connects one of the interface output lines to the interface output line that outputs data to the data terminal device, disconnecting the interface input line from the first switching circuit, disconnecting the second switching circuit and the interface output line;
It is characterized in that it has a circuit that connects the output of the test code generator to the interface output line and connects the test code verifier input to the interface input line.
以下１図面を参照して本発明の実施例につき説明する。Embodiments of the present invention will be described below with reference to one drawing.
＠２図は本発明によるデータ伝送装置の実施例を示し、
第１図と同一部分は同一符号で示し、その説明は省略す
る。第２図に示すデータ伝送装置。@2 Figure shows an embodiment of the data transmission device according to the present invention,
Components that are the same as those in FIG. 1 are designated by the same reference numerals, and their explanations will be omitted. The data transmission device shown in FIG.
Ｉ２においては試験符号発生器２−１が切替回路２−８
によシデータ出力＃ｌ−２に接続され、試験符号照合器
２−６が切替回路２−７によシデータ入力線１−１に接
続されている。障害探知のだめＤＴＥＩの直流側にてＤ
ＣＥ２へ向けて折返し１１を実施した後、試験符号発生
器２−１よ逆符号を送出すれば、切替回路２−８、イ／
ター７エース出力線１−２．及びインターフェース入力
線ｌ−１及び切替回路２−７を経由して符号照合器２−
６へ試験符号が戻ってくるため、ビット誤シチェックが
行なえ、ＤＴＥＩとＤＣＥ２との間の良否判定が可能と
なる。壕だ従来の自己診断機能も、切替回路２−２を切
替えて、試験符号発生器２−１を変調器２−ジに接続し
また切替回路２−５を切替て、復調器２−４を試験符号
照合器２−６に接続することを行えば前述の如〈実施で
きる。In I2, the test code generator 2-1 is connected to the switching circuit 2-8.
A test code verifier 2-6 is connected to the data input line 1-1 through a switching circuit 2-7. D on the DC side of the DTEI for failure detection.
After performing loopback 11 toward CE2, if the test code generator 2-1 sends out the reverse code, the switching circuit 2-8,
7 ace output line 1-2. and the code verifier 2- via the interface input line l-1 and the switching circuit 2-7.
Since the test code is returned to 6, a bit error check can be performed, and it is possible to determine whether DTEI and DCE2 are good or bad. The conventional self-diagnosis function also switches the switching circuit 2-2, connects the test code generator 2-1 to the modulator 2-ji, and switches the switching circuit 2-5 to connect the demodulator 2-4. By connecting to the test code checker 2-6, the above-mentioned operation can be carried out.
以上述べてきたように、本発明によれば、データ伝送装
置よシ自局のデータ端末装置側に向けての診断が可能と
な９、従来発見できなかったＤＴＥ−Ｄ ＣＥ間の障害
も探知できる。As described above, according to the present invention, it is possible to perform diagnosis from the data transmission device to the data terminal device of the own station.9 It is also possible to detect faults between DTE and DCE that could not be detected conventionally. can.
第１図は従来のデータ伝送装置を示すブロック図、第２
図は本発明のデータ伝送装置の実施例を示すブロック図
である。
１．４・・・・・・データ端末装置％ ２，３．１２・
・・・・・データ伝送装置、５．６・・・・・・線路、
７・・・・・・自局ＤＣＥ線路側折返し、８・・・・・
・相手局ＤＣＥ線路側折返し。
９・・・・・・相手局Ｊ） ＣＥ直流側折返し、１０・
・・・・・相手局ＤＴＥ直流側折返し。
１−１・・・・・・インターフェース入力＃ｉ！％ ｌ
−２・・・・・・インターフェース出力線、２−１・・
・・・・試験符号発生器、２−２．２−５・・・・・・
切替回路、２−３・・・・・・変調器、２−４・・・・
・・復調器、２−６・・・・・・試験符号照合器、２−
７．２−８・・・・・・選択切替回路。Figure 1 is a block diagram showing a conventional data transmission device, Figure 2 is a block diagram showing a conventional data transmission device.
The figure is a block diagram showing an embodiment of a data transmission device of the present invention. 1.4...Data terminal equipment% 2,3.12.
...Data transmission equipment, 5.6...Line,
7... Return to own station DCE track side, 8...
・Turn back to the other station DCE line side. 9...Other station J) CE DC side return, 10.
...Return to the other station's DTE DC side. 1-1...Interface input #i! %l
-2...Interface output line, 2-1...
...Test code generator, 2-2.2-5...
Switching circuit, 2-3...Modulator, 2-4...
...Demodulator, 2-6...Test code checker, 2-
7.2-8...Selection switching circuit.
Claims (1)
データ符号と入力されたデータ符号との相違を検出する
試験符号照合器と、変調器と、復調器と、前記試験符号
発生器出力とデータ端末装置直からデータを入力するイ
ンターフェース入力線とのいずれか一方を選び前記変調
器に接続する第一の切替回路と、前記復調器出力を前記
試験符号照合器へか前記データ端末装置へデータを出力
するインターフェース出力線へかの一方を選び接続する
第二の切替回路とを有するデータ伝送装置において、前
記インターフェース入力線と前記第一の切替回路との接
続を切離し、前記第二の切替回路と前記インターフェー
ス出力線との接続を切離し、前記試験符号発生器の出力
を前記インターフェース出力線へ接続し、前記試験符号
照合器入力を前記インターフェース入力線に接続する回
路を有すること？特徴とするデータ伝送装置。A test code generator that generates a predetermined data code, a test code collation device that detects a difference between the data code and an input data code, a modulator, a demodulator, and the test code generator output and data. a first switching circuit that selects one of the interface input lines for inputting data directly from the terminal device and connects it to the modulator; and a first switching circuit that connects the output of the demodulator to the test code verifier or the data terminal device; In a data transmission device having a second switching circuit that selects and connects one of the interface input lines to the output interface output line, the connection between the interface input line and the first switching circuit is disconnected, and the second switching circuit and comprising a circuit for disconnecting the interface output line, connecting the output of the test code generator to the interface output line, and connecting the test code verifier input to the interface input line? Characteristic data transmission device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57192149A JPS5981949A (en) | 1982-11-01 | 1982-11-01 | Data transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57192149A JPS5981949A (en) | 1982-11-01 | 1982-11-01 | Data transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5981949A true JPS5981949A (en) | 1984-05-11 |
Family
ID=16286509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57192149A Pending JPS5981949A (en) | 1982-11-01 | 1982-11-01 | Data transmitter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5981949A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02260838A (en) * | 1989-03-31 | 1990-10-23 | Nec Corp | Maintenance test system |
-
1982
- 1982-11-01 JP JP57192149A patent/JPS5981949A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02260838A (en) * | 1989-03-31 | 1990-10-23 | Nec Corp | Maintenance test system |
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