JPS6336703B2 - - Google Patents
Info
- Publication number
- JPS6336703B2 JPS6336703B2 JP56155272A JP15527281A JPS6336703B2 JP S6336703 B2 JPS6336703 B2 JP S6336703B2 JP 56155272 A JP56155272 A JP 56155272A JP 15527281 A JP15527281 A JP 15527281A JP S6336703 B2 JPS6336703 B2 JP S6336703B2
- Authority
- JP
- Japan
- Prior art keywords
- modem
- test
- line
- loop
- transmitting
- 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.)
- Expired
Links
- 238000012360 testing method Methods 0.000 claims description 55
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 230000003213 activating effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000003745 diagnosis Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/24—Testing correct operation
- H04L1/242—Testing correct operation by comparing a transmitted test signal with a locally generated replica
- H04L1/243—Testing correct operation by comparing a transmitted test signal with a locally generated replica at the transmitter, using a loop-back
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
Description
【発明の詳細な説明】
本発明はデータ伝送系における折返し試験等を
制御する試験制御方式に係り、特に回線を介して
データ送受信を行なう変複調装置（モデム）間で
の折返し試験を行なうための試験制御方式に関す
る。[Detailed Description of the Invention] The present invention relates to a test control method for controlling loopback tests, etc. in a data transmission system, and particularly for carrying out loopback tests between modulators (modems) that transmit and receive data via a line. Concerning test control methods.
モデムによつて回線上のデータを送受信してデ
ータ伝送を行なうデータ伝送システムにおいて
は、システム運転開始時或いはシステムの障害時
に折返し試験によつてシステム各部の機能診断を
行なうための機能が設けられている。第１図は折
返し試験の原理を示すブロツク図である。同図中
１，４は端末装置、２，３はモデム、５，５′は
ループ制御装置、６は通信回線である。ループ制
御装置５はモデム２内のデータ送受信回路を一時
的に切離しアナログスイツチ等を駆動して複数個
のループ回路を選択して形成せしめるものであ
る。即ち同図においては、端末装置１とのインタ
ーフエイス部で、端末装置１からモデム２を介し
て回線６へ出力される送信データをモデム２が回
線６より受信した如く端末装置へ入力する受信デ
ータとする折返しループａと、回線６から受信し
た受信データを端末装置から出力された送信デー
タの如く回線６へ折返すループｂとを形成せしめ
る。またモデム２の回線側において、回線への送
信データを回線からの受信データの如く折返す折
返しループＣ、さらに回線からの受信データを自
局側からの送信データの如く折返す折返しループ
ｄを形成せしめる。これらのループａ〜ｄは折返
し試験を行なう箇所によつて測定者が選択して形
成せしめるものである。即ち端末装置１より送出
した所定の試験データをループａによつて折返
し、しかる後に端末装置１が受信するデータが送
出したデータと同一のものであれば端末装置１と
モデム２間のデータ回線は異常なしと診断でき
る。同様にループＣを用いて端末装置１より送出
した試験データをモデム２の回線側で折返すこと
によつてモデム２内の送受信系回路をも含めた端
末装置１とモデム２間のデータ回線の機能診断を
行なうことが可能となる。 In a data transmission system that transmits data by sending and receiving data on a line using a modem, a function is provided to perform a functional diagnosis of each part of the system through a return test at the start of system operation or at the time of system failure. There is. FIG. 1 is a block diagram showing the principle of the foldback test. In the figure, 1 and 4 are terminal devices, 2 and 3 are modems, 5 and 5' are loop control devices, and 6 is a communication line. The loop control device 5 temporarily disconnects the data transmitting/receiving circuit in the modem 2 and drives an analog switch or the like to select and form a plurality of loop circuits. That is, in the figure, at the interface with the terminal device 1, the transmission data outputted from the terminal device 1 to the line 6 via the modem 2 is input to the terminal device as if the modem 2 received it from the line 6. A return loop a is formed, and a loop b is formed, in which the reception data received from the line 6 is returned to the line 6 like the transmission data output from the terminal device. In addition, on the line side of the modem 2, a return loop C is formed that loops back data sent to the line as if it were data received from the line, and a loop d that loops back data received from the line as if it were data sent from the own station. urge These loops a to d are selected and formed by the measurer depending on the location where the folding test is to be performed. That is, the predetermined test data sent from the terminal device 1 is looped back through loop a, and if the data received by the terminal device 1 is the same as the data sent, the data line between the terminal device 1 and the modem 2 is It can be diagnosed that there is no abnormality. Similarly, by looping back the test data sent from the terminal device 1 using the loop C on the line side of the modem 2, the data line between the terminal device 1 and the modem 2 including the transmitting/receiving circuit in the modem 2 is It becomes possible to perform functional diagnosis.
さらにループｂとループｄは自局側折返し試験
の場合の他に端末装置４からのリモート折返し試
験を行なう場合に形成されるものである。即ちモ
デム３に対応して設けられているループ制御装置
５′は測定者によりリモート折返し試験モードが
指定されると、回線６を介して相手局であるルー
プ制御装置５にリモートコントロール信号を送出
する。このコントロール信号に従つてループ制御
装置５はモデム２内のループｂもしくはループｄ
を形成せしめる。これらのループのうち、ループ
ｄを用いた端末装置４又はモデム３からの試験デ
ータ折返しによつて回線６の機能を診断できる。
またループｂを用いることでモデム２の送受信系
をも含めたモデム間のデータ伝送系の機能を診断
できることになる。したがつて端末装置１側でリ
モート折返し試験モード指示を行なうと、ループ
制御装置５からのリモートコントロール信号によ
つて自動的に相手局のループ制御装置５′はモデ
ム３内に前述したモデム２内に形成されるループ
ｂ，ｄと同様に箇所にループb′，d′を形成せしめ
ることになる。 Further, loop b and loop d are formed when performing a remote return test from the terminal device 4 in addition to the case of a return test on the local station side. That is, when the remote loopback test mode is specified by the tester, the loop control device 5' provided corresponding to the modem 3 sends a remote control signal to the loop control device 5, which is the partner station, via the line 6. . According to this control signal, the loop control device 5 controls the loop b or loop d in the modem 2.
to form. Among these loops, the function of the line 6 can be diagnosed by returning test data from the terminal device 4 or modem 3 using loop d.
Furthermore, by using loop b, the function of the data transmission system between modems, including the transmission and reception system of modem 2, can be diagnosed. Therefore, when a remote loopback test mode instruction is issued on the terminal device 1 side, the remote control signal from the loop control device 5 automatically causes the loop control device 5' of the partner station to Loops b' and d' are formed at the same locations as loops b and d formed in .
このようにループ制御装置のループ形成制御に
よつて自局側のみならず相手局側のモデムの機能
診断が可能となる。しかし上述の如く、リモート
折返し試験を行なうには試験側と被試験側の両モ
デムにループ制御装置が必要である。したがつて
例えば複数の端末装置と回線を介してデータ送受
を行なうホスト局等のように各端末装置とのデー
タ送受のためのモデムを複数台有する場合は、複
数のモデムの大きさのシステム全体に占める割合
が高くなつた。このようにループ制御装置を個々
に具えたモデムを複数台有するホスト局の大型化
を解消するために考えられたのが第２図に示す集
中折返し制御方式のシステムである。御２図にお
いて７は集中折返し制御装置、８は集合モデム、
８−１，８−２，………８−ｎは単体モデム、
９，９′，………９″はモデム、１０，１０′……
…１０″は端末装置、S1，S2………Snは選択スイ
ツチである。選択スイツチS1〜Snは集中折返し
制御装置７と各単体モデムとの間の各種制御信号
線、即ち自局側モデム内に第１図に示す自局モデ
ムを介して相手局モデム内にリモート折返しルー
プd′，b′を形成せしめるためのリモートコントロ
ール信号線、さらに相手局モデムのループ制御装
置より出力されるリモートコントロール信号を受
けて回線側折込しループｂ，ｄを形成せしめるた
めの制御信号線を接続或いは切離しするものであ
る。したがつて選択スイツチS1〜Snの中の１つ
のスイツチを閉じることにより、閉じられたスイ
ツチに対応する集合モデム８内の１つの単体モデ
ムが折返し機能を有することになる。さらに選択
スイツチS1〜Snを順次選択して集中折返し制御
装置７の制御線を各単体モデムに接続することに
よつて、個々の単体モデムに集中折返し制御装置
７の持つ折返し制御機能を共有させることができ
る。これによつて各モデムをコンパクト化し、１
つの集合モデムとすることができる。 In this way, the loop formation control of the loop control device makes it possible to diagnose the functions of the modems not only on the local station side but also on the remote station side. However, as mentioned above, in order to perform a remote loopback test, a loop control device is required for both the modem on the test side and the modem under test. Therefore, if you have multiple modems for sending and receiving data with each terminal device, such as a host station that sends and receives data to and from multiple terminal devices via lines, the entire system will be the size of the multiple modems. The proportion of this has increased. In order to solve this problem of increasing the size of a host station having a plurality of modems each individually equipped with a loop control device, a centralized loopback control system shown in FIG. 2 was devised. In Figure 2, 7 is a centralized loopback control device, 8 is a collective modem,
8-1, 8-2, 8-n are single modems,
9, 9',...9'' is the modem, 10, 10'...
...10'' is a terminal device, S 1 , S 2 ......Sn is a selection switch.Selection switches S 1 to Sn are various control signal lines between the centralized loopback control device 7 and each individual modem, that is, the own station. A remote control signal line for forming remote return loops d' and b' in the remote station modem through the local modem shown in Figure 1 in the side modem, and further output from the loop control device of the remote station modem. This is to connect or disconnect the control signal line for forming line-side folding loops b and d in response to a remote control signal.Therefore, by closing one of the selection switches S1 to Sn. , one single modem in the collective modem 8 corresponding to the closed switch has a loopback function.Furthermore, selection switches S 1 to Sn are sequentially selected to connect the control line of the centralized loopback control device 7 to each single modem. By connecting to the central loopback control device 7, each single modem can share the loopback control function of the centralized loopback control device 7.This allows each modem to be compact and
It can be one collective modem.
しかるに第２図に示す集中折返し制御方式にお
いては、例えば端末装置１０″側よりホスト局の
リモート折返し試験を行なう場合、端末装置１
０″側のモデム９″とデータ送受する集合モデム８
内の単体モデム８−ｎ内にリモート折返しループ
を形成せしめる必要がある。しかしながら上述し
たように単体モデム８−ｎ内にループを形成せし
めるにはホスト局側の集中折返し制御装置７がス
イツチSnを選択されて単体モデム８−ｎの折返
し制御を行なう状態でなければならない。ところ
がホスト局側ではスイツチS1〜Snのどのスイツ
チが選択されているか定まつておらず、スイツチ
Snとは別のスイツチが選択されている場合が
往々にしてある。この結果端末装置側よりホスト
局側へのリモート折返し試験を行なう場合、試験
を行なう端末装置に対応する集合モデム内の所定
の単体モデムをスイツチS1〜Snで選択する必要
がある。したがつて、相手局側の人手を介在しな
いで行ない得る本来のリモート折返し試験が不可
能となる欠点を有した。 However, in the centralized loopback control system shown in FIG.
Collective modem 8 that sends and receives data to modem 9″ on the 0″ side
It is necessary to form a remote return loop within the single modem 8-n. However, as described above, in order to form a loop within the single modem 8-n, the centralized loopback control device 7 on the host station side must be in a state where switch Sn is selected to perform loopback control of the single modem 8-n. However, on the host station side, it is not determined which switch from switches S 1 to Sn is selected, and the switch
In many cases, a switch other than Sn is selected. As a result, when performing a remote return test from the terminal device side to the host station side, it is necessary to select a predetermined single modem in the collective modem corresponding to the terminal device to be tested using the switches S 1 -Sn. Therefore, there was a drawback that the original remote return test, which could be performed without human intervention on the partner station side, was impossible.
本発明の目的は上述した従来の欠点を取除くべ
く、従来の集合モデム型のシステムにおいて相手
局側からの自由なリモート折返し試験が可能な、
且つ集合モデム形体の本来の目的であるモデム装
置の小型化をも満足し得る試験制御方式を提供す
るにある。 The purpose of the present invention is to eliminate the above-mentioned drawbacks of the conventional system by providing a system that enables free remote call-back testing from the other party's side in the conventional aggregate modem type system.
Another object of the present invention is to provide a test control method that can satisfy the original purpose of the collective modem configuration, which is miniaturization of modem devices.
上記目的を達成するため本発明の試験制御方式
は、回線を介してデータの送受信制御を行なう複
数の送受信装置と、試験装置とを有し、該送受信
装置内試験を回線を介して対向する装置より受信
した信号によつて試験する試験制御方式におい
て、前記複数の送受信装置に設けられ個々の送受
信装置を試験する独立試験手段と、該複数の送受
信装置を切換えて試験を行なう集中試験手段と、
該独立試験手段と該集中試験手段とを選択する選
択手段とを有し、該選択手段によつて選択された
試験手段を回線を介して起動して送受信装置の試
験を行なうことを特徴とする。 In order to achieve the above object, the test control method of the present invention includes a plurality of transmitting/receiving devices that control the transmission and reception of data via a line, and a test device, and a device facing the testing device via the line. In a test control method in which a test is performed using a signal received from the plurality of transmitting and receiving devices, an independent testing means is provided in the plurality of transmitting and receiving devices and tests each of the transmitting and receiving devices, and a centralized testing means is configured to switch and test the plurality of transmitting and receiving devices;
It is characterized by comprising a selection means for selecting the independent testing means and the centralized testing means, and testing the transmitting/receiving device by activating the testing means selected by the selection means via a line. .
以下実施例を用いて本発明を詳述する。 The present invention will be explained in detail below using Examples.
第３図は本発明の一実施例を示す図である。即
ち本発明においては集合モデム８内の各単体モデ
ム８−１，８−２，………８−ｎに選択回路１１
を設け、前述したループ制御装置５と集中折返し
制御装置７とを選択できるようにしたものであ
る。この選択回路１１によつて、例えば相手局側
からリモート折返し試験が行なわれる単体モデム
８−１にはループ制御装置５を選択して接続で
き、またホスト局側からのみリモート折返し試験
するモデム８−２には集中折返し制御装置７の制
御信号線が選択できる。 FIG. 3 is a diagram showing an embodiment of the present invention. That is, in the present invention, each single modem 8-1, 8-2, . . . 8-n in the collective modem 8 has a selection circuit 11
is provided so that the loop control device 5 and the centralized loop control device 7 described above can be selected. With this selection circuit 11, for example, the loop control device 5 can be selectively connected to the standalone modem 8-1 on which a remote loopback test is performed from the partner station side, and the modem 8-1 on which a remote loopback test is conducted only from the host station side. 2, the control signal line of the centralized loopback control device 7 can be selected.
第４図は第３図に示した選択回路１１の一具体
例であり、１５はANDゲート、１６はインバー
タ、１７は選択ストラツプである。端子１２には
集中折返し制御装置からの制御信号線が接続さ
れ、端子１３にはループ制御装置５からの制御信
号線が接続される。端子１２，１３は２つの
ANDゲート１５の一入力端子に接続される。こ
れら２つのANDゲート１５のもう一方の入力に
は選択ストラツプの供給する“Ｈ”、“Ｌ”レベル
信号がインバータ１６によつてそれぞれ逆のレベ
ル信号として入力される。したがつて選択ストラ
ツプ１７により“Ｈ”レベルを与えられたAND
ゲート１５がゲートを開き、このゲートに接続さ
れる制御装置の折返し制御信号が出力端子１４へ
出力されることになる。このように実施例におい
ては数個のゲートを用いた簡単な選択回路を設け
ることによつて、集中折返し制御及び独立のルー
プ制御のいずれの制御モードをもモデムに与える
ことが可能となる。したがつて相手局側からのリ
モート折返しが行なわれるモデムには独立ループ
制御装置を選択して具え、自局側からのみリモー
ト折返し試験を行なうモデムにおいては集中制御
装置を選択して具えることができる。この結果相
手局側からのリモート折返し試験も自由に行なわ
れ、且つ自局側では集中折返し制御形体を維持で
きるため集合モデムの大型化を最小限にとどめる
ことが可能となる。 FIG. 4 shows a specific example of the selection circuit 11 shown in FIG. 3, in which 15 is an AND gate, 16 is an inverter, and 17 is a selection strap. A control signal line from the central loop control device is connected to the terminal 12, and a control signal line from the loop control device 5 is connected to the terminal 13. Terminals 12 and 13 are two
It is connected to one input terminal of the AND gate 15. The "H" and "L" level signals supplied by the selection strap are input to the other inputs of these two AND gates 15 by an inverter 16 as opposite level signals. Therefore, the AND given the “H” level by the selection strap 17
Gate 15 opens the gate, and a return control signal from a control device connected to this gate is output to output terminal 14. In this embodiment, by providing a simple selection circuit using several gates, it is possible to provide the modem with either the centralized loop control mode or the independent loop control mode. Therefore, a modem that performs remote loopback tests from the other station may be equipped with an independent loop control device, and a modem that performs remote loopback tests only from its own station may be equipped with a central control device. can. As a result, remote loopback tests from the other station can be performed freely, and since the local station can maintain a centralized loopback control configuration, it is possible to minimize the size of the collective modem.
以上詳述したように本発明によれば、集合モデ
ム全体の小型化を維持すると共に相手局側からの
リモート折返し試験が任意に行なわれ得る折返し
制御方式を提供でき、データ伝送システムにおけ
る種々の機能診断を迅速に行なうことができる。 As described in detail above, according to the present invention, it is possible to provide a loopback control method that maintains the miniaturization of the entire aggregate modem and allows remote loopback tests to be performed arbitrarily from the other station side, thereby improving various functions in a data transmission system. Diagnosis can be made quickly.
第１図はデータ伝送システムにおける折返し試
験の説明図、第２図は集合モデムにおける集中折
返し試験制御方式を示すブロツク図、第３図は本
発明の試験制御方式の一実施例を示すブロツク
図、第４図は第３図に示す選択回路１１の一具体
例を示すブロツク図である。２，３はモデム、
５，５′はループ制御装置、７は集中折返し制御
装置、８は集合モデム、１１は選択回路である。
FIG. 1 is an explanatory diagram of a loopback test in a data transmission system, FIG. 2 is a block diagram showing a centralized loopback test control method in an aggregate modem, and FIG. 3 is a block diagram showing an embodiment of the test control method of the present invention. FIG. 4 is a block diagram showing a specific example of the selection circuit 11 shown in FIG. 3. 2 and 3 are modems,
5 and 5' are loop control devices, 7 is a centralized loop control device, 8 is a collection modem, and 11 is a selection circuit.
Claims (1)
数の送受信装置と、試験装置とを有し、該送受信
装置内試験を回線を介して対向する装置より受信
した信号によつて試験する試験制御方式におい
て、前記複数の送受信装置に設けられ個々の送受
信装置を試験する独立試験手段と、該複数の送受
信装置を切換えて試験を行なう集中試験手段と、
該独立試験手段と該集中試験手段とを選択する選
択手段とを有し、該選択手段によつて選択された
試験手段を回線を介して起動して送受信装置の試
験を行なうことを特徴とする試験制御方式。1 In a test control method that includes a plurality of transmitting/receiving devices that control data transmission and reception via a line and a test device, and tests the transmitting/receiving devices using signals received from opposing devices via the line. , an independent test means provided in the plurality of transmitting/receiving devices for testing each individual transmitting/receiving device, and a centralized testing means for testing the plurality of transmitting/receiving devices by switching between them;
It is characterized by comprising a selection means for selecting the independent testing means and the centralized testing means, and testing the transmitting/receiving device by activating the testing means selected by the selection means via a line. Test control method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56155272A JPS5857844A (en) | 1981-09-30 | 1981-09-30 | Test and control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56155272A JPS5857844A (en) | 1981-09-30 | 1981-09-30 | Test and control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5857844A JPS5857844A (en) | 1983-04-06 |
| JPS6336703B2 true JPS6336703B2 (en) | 1988-07-21 |
Family
ID=15602270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56155272A Granted JPS5857844A (en) | 1981-09-30 | 1981-09-30 | Test and control system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5857844A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63296539A (en) * | 1987-05-28 | 1988-12-02 | Matsushita Electric Ind Co Ltd | Communication controller for home bus system |
| JPH06105924B2 (en) * | 1987-07-29 | 1994-12-21 | 日本電気株式会社 | Collective modem centralized control method |
| JPH0237867A (en) * | 1988-07-28 | 1990-02-07 | Fujitsu Denso Ltd | Loop back test control system |
| JPH04264863A (en) * | 1991-02-19 | 1992-09-21 | Fujitsu Ltd | Fault specifying system |
-
1981
- 1981-09-30 JP JP56155272A patent/JPS5857844A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5857844A (en) | 1983-04-06 |
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