JPS5992661A - Subscriber line test system - Google Patents

Subscriber line test system

Info

Publication number
JPS5992661A
JPS5992661A JP20192882A JP20192882A JPS5992661A JP S5992661 A JPS5992661 A JP S5992661A JP 20192882 A JP20192882 A JP 20192882A JP 20192882 A JP20192882 A JP 20192882A JP S5992661 A JPS5992661 A JP S5992661A
Authority
JP
Japan
Prior art keywords
line
lines
external voltage
subscriber line
specified value
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
Application number
JP20192882A
Other languages
Japanese (ja)
Inventor
Yukio Iino
飯野　幸雄
Tetsuo Seari
瀬在　哲夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP20192882A priority Critical patent/JPS5992661A/en
Publication of JPS5992661A publication Critical patent/JPS5992661A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
    • H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

PURPOSE:To measure and display not only an external voltage, but also a measurable subscriber line constant speedily and automatically by deciding automatically on whether an external voltage which is higher than a specific level is applied to each of lines A and B. CONSTITUTION:A voltage detecting circuit 3 detects whether an external voltage higher than the specific value is applied or not to the lines A and B and reports the result to a controller 4. When the external voltage applied to the lines A and B is lower than the specific level, the lines A and B are connected to a voltage measuring circuit 1 and a resistance measuring circuit 2 to measure the external voltage on lines A and B and resistances between the line A and ground and the line B and ground. Then, a contact grd is closed to measure the resistance RAB between the lines A and B. This measured result is fetched to the controller 4 and displayed to the outside. When the external voltage between the lines A and B is higher than the specific level, the subscriber line constant is not measured.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は、加入者線路に無視し得ない程の外来電圧が存
する場合はその外来電圧ばかシか、測定可能な加入者線
路定数をも自動的に測定したうえ外部た表示するように
した加入者線路試験方式に関するものである。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention automatically detects the external voltage or the measurable subscriber line constant when there is a non-negligible external voltage on the subscriber line. This relates to a subscriber line test method in which measurements are taken visually and then displayed externally.

〔従来技術〕[Prior art]

第１図は電子交換機における従来技術に係る加入者線路
試験方式を示すが、これにすると少なくとも加入者線路
の何れか１つ忙規定以上の外来電圧が存する場合には被
測定加入者電話機対応の加入者線路についての各種線路
定数は知り得ないものとなっている。Figure 1 shows a subscriber line test method according to the prior art in an electronic exchange.In this case, if at least one of the subscriber lines has an external voltage higher than the busy specification, the subscriber telephone under test cannot be tested. Various line constants for subscriber lines are unknown.

即ち、被測定加入者電話機５ｕｂｓＸについての加入者
線路定数を自動的忙測定する場合、空間分割スイッチＳ
Ｗから加入者側に接続されるＡ線Ａｏ　、　Ｂ　ｌｉ！
　Ｂｏは空間分割スイッチＳＷより交換機側に接続され
るＡｆｓＡ、、　Ｂ線Ｂ、に接続されるようになってい
る。被測定加入者電話機５ｕｂ−Ｘ対応のＡ線Ａ。、Ｂ
線Ｂ０を加入者線路試験装置ＬＴＥに引き込むべく空間
分割スイッチＳＷが制御されるわけである。加入者線路
試験装置Ｌ’［’Ｅに引ｂｕれた状ａで１ｔＡｌｓＡ０
．Ａ、、Ｂ線ｎ０．Ｂ。That is, when automatically measuring the subscriber line constant for the subscriber telephone 5ubsX to be measured, the space division switch S
A lines Ao, Bli! are connected from W to the subscriber side.
Bo is connected to the AfsA, B line B, which is connected to the exchange side from the space division switch SW. A line A corresponding to subscriber telephone 5ub-X to be measured. , B
The space division switch SW is controlled to draw the line B0 into the subscriber line testing equipment LTE. Subscriber line test equipment L'['1tAlsA0 in state a pulled to E
．． A,,B line n0. B.

は先ずリレーＭｌｉ！Ｓ　（図示せず）の接点ｍｅｓを
介し外来電圧検出回路０ＶＤＥ’ｌ’に接続され、Ａ線
、Ｂ線の少なくとも何れかに交換機側に誤動作を誘引す
る程度の交流、＠流の外来電圧が存するか否かが検出さ
れるようになっている。ＡＭ％　Ｂ線よりともに規定値
以下の外来電圧が検出された場合には初めて接点ｎｎｅ
ｓが線路諸定数測定回路ＬＭＥＳ側に切替接続されるこ
とによって、被測定加入者電話機５ｕｂ−Ｘ対応の加入
者線絡路定数が測定表示されるようになっているもので
ある。また。First of all, relay Mli! It is connected to the external voltage detection circuit 0VDE'l' through the contact mes of S (not shown), and there is an external voltage of AC or @ current to the extent that it induces a malfunction on the exchange side at least on either the A line or the B line. The presence or absence of the data is detected. AM% When an external voltage below the specified value is detected along with the B line, the contact nne is closed for the first time.
By switching and connecting s to the line constants measuring circuit LMES, the subscriber line constants corresponding to the subscriber telephone 5ub-X to be measured are measured and displayed. Also.

もしもＡ線、Ｂａの少なくとも何れか１つに規定値以上
の外来電圧が検出された場合はこの旨を表示するだけで
、外来電圧の存在しないＡ線又はＢ線の加入者線絡路定
数は測定されな−ようになっている。If an external voltage higher than the specified value is detected on at least one of the A line or Ba, only this message will be displayed, and the subscriber line constant of the A line or B line where no external voltage exists will be changed. It is designed so that it cannot be measured.

このよ５に従来にあっては規定値以上の外来電圧が存し
てもその旨の表示があるだけで、その絶対的な大きさを
知力得す別途保守サービス員による測定によって初めて
知り得ていたのが実情である。In the past, even if there was an external voltage that exceeded the specified value, there was only a display to that effect, and the absolute magnitude could only be known through measurement by a separate maintenance service personnel who had the intellect. The reality is that

仮にＡ線だけに規定値以上の外来電圧が存する場合、Ａ
細大地間、Ａ、Ｂ線間につｂての絶縁抵抗、容量の測定
は不可能であるにしても、Ｂ細大地間の絶縁抵抗、容量
も知力得な騒という不具合がある。If an external voltage higher than the specified value exists only on the A line,
Although it is impossible to measure the insulation resistance and capacitance between the thin ground and between the A and B wires, there is a problem in that the insulation resistance and capacitance between the thin ground and the B wire also make noise.

〔発明の目的〕[Purpose of the invention]

よって、本発明の目的は、加入者線路の何れか一方に規
定値以上の外来電圧が存する場合でもその外来電圧ばか
夕か、他忙測定可能な加入者線路定数をも迅速忙、しか
も自動的に測定表示し得る加入者線路試験方式を供する
にある。Therefore, it is an object of the present invention to quickly and automatically determine the subscriber line constants, which can be measured in addition to the external voltage, even if there is an external voltage higher than a specified value on either side of the subscriber line. The objective is to provide a subscriber line test method that can be measured and displayed.

〔発明の概要〕[Summary of the invention]

この目的のため本発明は、Ａ線、Ｂ線を地気状態におく
ことを可とした状態でＡ＠、Ｂ線を加入者線路試験装置
に引き込み先ずＡ＠、Ｂ線各々に規定値以上の外来電圧
が存するか否かを自動的に判定し、Ａ線、Ｂ＃の何れか
一方に少なくとも規定値以上の外来電圧が存すると判定
された場合にはその外来電圧を測定表示し、Ａ線、Ｂ線
ともに外来電圧が存すると判定され念場合以外は外来電
圧が規定値以下と判定された。Ａ＃大地間、Ｂａ大地間
あるいはＡＢ線間の絶縁抵抗をも測定回として他の測定
可能な加入者線路定数を自動的に測定表示するようにし
たものである。For this purpose, the present invention first introduces the A@ and B lines into the subscriber line testing equipment while allowing the A and B lines to be in the earth's condition, and first, the A@ and B lines each exceed a specified value. automatically determines whether or not an external voltage exists, and if it is determined that an external voltage of at least a specified value or higher exists on either the A line or B#, the external voltage is measured and displayed; It was determined that there was an external voltage on both the line and the B line, and the external voltage was determined to be below the specified value except in case of emergency. Other measurable subscriber line constants are automatically measured and displayed by measuring the insulation resistance between A# ground, Ba ground, or AB wire.

〔発明の実施例〕[Embodiments of the invention]

以下１本発明を第２図、第３図により説明する。 The present invention will be explained below with reference to FIGS. 2 and 3.

第２図は本発明による加入者線路試験方式を示したもの
であるが、これによるとマイクロプロセッサを含むコン
トローラ４からのシーケンス制御により外来電圧が存す
る場合であっても自動的に測定回とされる線路定数が測
定表示されるようになっている。コントローラ４からの
制御釦よりリレー接点ｒｅｖ１ｇｒｄ、ａ、ｂ１ｍｅＢ
が開閉制御されるようになっているものである。これに
よりＡｌｓ。FIG. 2 shows a subscriber line test method according to the present invention, in which even if an external voltage is present, it is automatically determined as a measurement cycle by sequence control from the controller 4 including a microprocessor. The line constants are now measured and displayed. Relay contacts rev1grd, a, b1meB from the control button from controller 4
The opening and closing of the door is controlled. This allows Als.

Ｂａはコンパレークなどよりなる電圧検出回路３やＡ／
Ｄ変換器などよりなる電圧測定回路１゜Ａ／Ｄ変換器な
どよりなる抵抗測定回路２Ｖｃ引込町となっている一方
、Ａ、Ｂｇ間線路定数を測定する際閉成されるリレー接
点ｇｒｄにより外来電圧が存する場合であっても強制的
に地気状態におかれることか可能となっているわけであ
る。Ba is the voltage detection circuit 3 consisting of a comparator or the like, and A/
Voltage measuring circuit 1 consisting of a D converter etc. 2 Resistance measuring circuit consisting of an A/D converter etc. Even when voltage is present, it is possible to be forced into an earthly state.

第３図は測定手順の一例を示すが、これによると線路定
数を測定する際には先ずＡ線、Ｂ線に規定値以上の外来
電圧がともに存するか否かが判定されるようになってい
る。第２図に示す状態で先ずＡ＃を電圧検出回路３に引
き込み１次いでリレー接点ｒｅｖを一時的に動作させて
Ｂ線を引き込むようにするものである。Ａ＃、Ｂ線に規
定値以上の外来電圧が存するか否かは電圧検出回路３よ
シコントローラ４に報告されるが、仁れによシコントロ
ーラ４は必要なシーケンス制御をとるところとなる。Figure 3 shows an example of the measurement procedure. According to this, when measuring line constants, it is first determined whether or not there is an external voltage higher than a specified value on both the A line and the B line. There is. In the state shown in FIG. 2, A# is first drawn into the voltage detection circuit 3, and then the relay contact rev is temporarily operated to draw the B line. The voltage detection circuit 3 reports to the controller 4 whether or not there is an external voltage greater than a specified value on the A# and B lines, and the controller 4 is responsible for performing necessary sequence control.

即ち、Ａ線、Ｂａでの外来電圧が規定値以下の場合Ａ線
、Ｂ線は電圧測定回路１、抵抗測定回路２釦順次引き込
まれ、　Ａ線、　Ｂｌｓ上での外来電圧。That is, when the external voltage on the A line and Ba is below the specified value, the A line and B line are drawn in sequentially to the voltage measurement circuit 1 and resistance measurement circuit 2 buttons, and the external voltage on the A line and Bls is increased.

Ａ細大地間抵抗、Ｂ細大地間抵抗が測定されこれら測定
値はコントローラ４Ｖｃ取勺込まれるようになって込る
。この後リレー接点ｇｒｄが閉成されることによってＡ
、Ｂ線間抵抗ＲＡＩＩが測定されるようになって因るも
のである。コントａ−２４に取り込まれた測定結果は表
示手段（図示せず）によって外部に表示されるところと
なるが、これにより加入者線路定数が迅速に、しかも自
動的に測定表示され得る。なお、Ａ線、Ｂ線での外来電
圧が規定値以下の場合にもその外来電圧が測定表示され
て−るが、加入者線路の回線劣化状態の度合を保守員に
知らせること釦より早期保守を促すためである。A small ground resistance and B small ground resistance are measured and these measured values are input to the controller 4Vc. After this, relay contact grd is closed, so that A
, B line resistance RAII is now measured. The measurement results taken into the controller A-24 are displayed externally by a display means (not shown), which allows the subscriber line constant to be quickly and automatically measured and displayed. In addition, even if the external voltage on the A line or B line is below the specified value, the external voltage is measured and displayed, but if you press the button to notify maintenance personnel of the degree of line deterioration of the subscriber line, you can perform early maintenance. This is to encourage

Ａ線、Ｂ線上での外来電圧が規定値以下の場合は以上の
ようであるが、そうでない場合にはＡ線、及びＢ）ｌｌ
ｌｉｌでの外来電圧が測定された後、Ａ線、Ｂ線上での
外来電圧がともに規定値以上か否かが判定されるように
なっている。この判定でもしもＡ線、Ｂｉ上での外来電
圧がともに規定値以上の場合には加入者線路定数の測定
は行なわれないが。If the external voltage on the A line and B line is below the specified value, the above is the case, but if not, the A line and B)ll
After the external voltage at lil is measured, it is determined whether the external voltages on the A line and the B line are both equal to or higher than a specified value. In this judgment, if the external voltages on the A line and Bi are both greater than the specified value, the subscriber line constant will not be measured.

そうでない場合は一部の線路定数のみが測定されるよう
になっている。即ちＡ線上での外来電圧のみが規定値以
上の場合けＢａ大地間およびＡ、Ｂ線間の抵抗が測定さ
れるものである。Ｂ線上での外来電圧のみが規定値以上
の場合も事情は同様である。従来にあってはＡ、Ｂ線上
での外来電圧がともに規定値以下である場合のみ線路定
数が測定されてｂたが、本発明による場合ＦｉＡ線、Ｂ
線の何れか一方のみに規定値以上の外来電圧が存する場
合であっても一部の線路定数が測定され得るものである
。Otherwise, only some line constants are measured. That is, when only the external voltage on the A line is above a specified value, the resistance between Ba and ground and between the A and B lines is measured. The situation is similar when only the external voltage on the B line is higher than the specified value. In the past, the line constant was measured only when the external voltages on the A and B lines were both below the specified value, but in the present invention, the line constants were measured only when the external voltages on the A and B lines were both below the specified value.
Even if an external voltage higher than a specified value exists on only one of the lines, some line constants can be measured.

次に、Ａ、Ｂ線間抵抗ＲＡＢの測定方法について説明す
る。Ａ、Ｂ＠ｉ間抵抗ＲＡＢを測定する際には基準電源
電圧（既知）　ＩＯを基準抵抗（既知）Ｒ８を介し一端
が地気電位におかれた抵抗ＲＡＢに印加した場合に抵抗
ＲＡＢにかかる電圧Ｖｒｎより容易に求められる。Next, a method for measuring the resistance RAB between the A and B lines will be explained. When measuring the resistance RAB between A and B@i, when the reference power supply voltage (known) IO is applied to the resistor RAB whose one end is placed at earth potential through the reference resistor (known) R8, the voltage applied to the resistor RAB It can be easily obtained from the voltage Vrn.

ｖｍ＝Ｅ０・ＲＡｌ／（ＲＡＢ十ＲＢ）・・・・・・（
１）従い式（１）よりＲＡＢは以下のように求められる
ことになる。vm=E0・RA1/(RAB1RB)・・・・・・(
1) Accordingly, RAB can be obtained from equation (1) as follows.

ＲＡＢ＝　Ｖｍ　１１Ｒｓ／　（Ｅｏ−４ｍ　）　　　
　−・”（２）コントローラ４は抵抗測定回路２からの
ディジタル出力Ｖｍの値にもとづき式（２）に示す演算
を行なうこと釦よってＡ、Ｂ線間抵抗ＲＡＮを求め得る
訳である。Ａｌ１Ｉ、Ｂ線の何れか一方に外来電圧が存
する場合でも第３図に示す如くにその外来電圧が存する
線を強制的に地気電位におくことにより、Ａ　、　Ｂ＠
間抵抗ＲＡＢを求め得るものである。RAB=Vm 11Rs/(Eo-4m)
-・”(2) The controller 4 can calculate the resistance RAN between the A and B lines by pressing the button to perform the calculation shown in equation (2) based on the value of the digital output Vm from the resistance measurement circuit 2.Al1I, Even if an external voltage exists on either of the B lines, A, B@
It is possible to obtain the inter-resistance RAB.

なお、以上の説明では容量測定につｂては触れていな−
が、Ａ線、Ｂ線の何れかに規定値以上の外来電圧が存す
る場合にはそのｌ１ＩＫ関する大地間容量および他方の
線との間での容量は測定されない。Ａ線、ＢＩｍの何れ
にも規定値以上の外来電圧が存する場合は何れの容量測
定も行なわれないことは言うまでもない。Note that the above explanation does not mention capacitance measurement.
However, if an external voltage higher than a specified value is present on either the A line or the B line, the capacitance between the ground and the other line related to I1IK is not measured. Needless to say, if an external voltage exceeding a specified value is present on either the A line or BIm, no capacitance measurement is performed.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明による場合は、加入者線路の
何れか一方に規定値以上の外来電圧が存する場合でも、
その外来電圧ばかヤか、何れにも規定値以上の外来電圧
が存する以外は測定可能な加入者線路定数を迅速に、し
かも自動的に測定表示し得るという効果がある。As explained above, in the case of the present invention, even if an external voltage higher than the specified value is present on either side of the subscriber line,
The present invention has the advantage that measurable subscriber line constants can be quickly and automatically measured and displayed, except when there is an external voltage that is higher than a specified value.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、電子交換機における従来技術に係る加入者線
路試験方式を示す図、第２図は、本発明による加入者線
路試験方式を示す図、第３図は。 本発明に係る加入者線路定数の測定手順を示す図である
。FIG. 1 is a diagram showing a subscriber line testing method according to the prior art in an electronic exchange, FIG. 2 is a diagram showing a subscriber line testing method according to the present invention, and FIG. 3 is a diagram showing a subscriber line testing method according to the present invention. FIG. 3 is a diagram showing a procedure for measuring subscriber line constants according to the present invention.

Claims (1)

【特許請求の範囲】 所定の演算を行ない、且つ測定手順を記憶してなる制御
手段による制御下に、加入者線路におけるＡ線、Ｂ線を
地気状態におくことを可とし、且つ鎖線を加入者線路試
験装置に引込町とした状態で上記Ａ）ｉｉ、Ｂ線各々に
規定値以上の外来電圧が存するか否かを自動的に判定し
たうえ、少なくとも何れか一方に規定値以上の外来電圧
が存すると判定された場合には該電圧の値を測定表示し
、Ａ。 Ｂ両線共に規定値以上の外来電圧が存すると判定された
場合以外、即ち、該試験装置に引込まれたＡ、Ｂ線のう
ち、外米電圧が規定値以下のものについては加入者線路
定数を自動的に測定表示することを特徴とする加入者線
路試験方式。[Claims] Under the control of a control means that performs predetermined calculations and stores measurement procedures, lines A and B in the subscriber line can be placed in the ground state, and the chain line is The subscriber line testing device automatically determines whether or not there is an external voltage higher than the specified value on each of the A) ii and B lines above when the line is connected to the subscriber line testing device, and if there is an external voltage higher than the specified value on at least one of the lines. If it is determined that a voltage exists, the value of the voltage is measured and displayed; A. Unless it is determined that there is an external voltage higher than the specified value on both B lines, that is, if the external voltage of the A and B lines connected to the test equipment is below the specified value, the subscriber line constant A subscriber line testing method characterized by automatically measuring and displaying.
JP20192882A 1982-11-19 1982-11-19 Subscriber line test system Pending JPS5992661A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20192882A JPS5992661A (en) 1982-11-19 1982-11-19 Subscriber line test system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20192882A JPS5992661A (en) 1982-11-19 1982-11-19 Subscriber line test system

Publications (1)

Publication Number Publication Date
JPS5992661A true JPS5992661A (en) 1984-05-28

Family

ID=16449111

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20192882A Pending JPS5992661A (en) 1982-11-19 1982-11-19 Subscriber line test system

Country Status (1)

Country Link
JP (1) JPS5992661A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6169785B1 (en) 1998-07-31 2001-01-02 Nec Corporation Apparatus and method for testing subscriber line

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6169785B1 (en) 1998-07-31 2001-01-02 Nec Corporation Apparatus and method for testing subscriber line

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