JPH0230657U - - Google Patents

Info

Publication number
JPH0230657U
JPH0230657U JP10841788U JP10841788U JPH0230657U JP H0230657 U JPH0230657 U JP H0230657U JP 10841788 U JP10841788 U JP 10841788U JP 10841788 U JP10841788 U JP 10841788U JP H0230657 U JPH0230657 U JP H0230657U
Authority
JP
Japan
Prior art keywords
voltage
circuit
comparison circuit
line
communication line
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
JP10841788U
Other languages
English (en)
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 filed Critical
Priority to JP10841788U priority Critical patent/JPH0230657U/ja
Publication of JPH0230657U publication Critical patent/JPH0230657U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Monitoring And Testing Of Exchanges (AREA)

Description

【図面の簡単な説明】
第1図は本考案の実施例を示す図、第2図は第
1図の実施例の実装ならびに操作パネルの例を示
す斜視図、第3図は電圧比較回路の動作を説明す
る図、第4図は回線の相混を測定する手順を示す
図、第5図は回線の他絡を測定する手順を示す図
である。 Vcc…電源、S,S…スイツチ、S
切替手段、S,R…回線、LED1〜LED5…
LEDランプ、IC1〜IC4…電圧比較回路、
〜R21…抵抗、51〜54…出力端子。

Claims (1)

    【実用新案登録請求の範囲】
  1. 通信回線の導通状態に応じた電圧を発生する電
    圧発生回路と、該電圧発生回路に生じた電圧と予
    め定められた基準電圧とを比較する電圧比較回路
    と、該電圧比較回路の出力端に設けられた表示器
    と、前記電圧発生回路に測定項目に対応して前記
    通信回線を切替・接続する切替手段とを有するこ
    とを特徴とするラインチエツカー。
JP10841788U 1988-08-18 1988-08-18 Pending JPH0230657U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10841788U JPH0230657U (ja) 1988-08-18 1988-08-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10841788U JPH0230657U (ja) 1988-08-18 1988-08-18

Publications (1)

Publication Number Publication Date
JPH0230657U true JPH0230657U (ja) 1990-02-27

Family

ID=31343726

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10841788U Pending JPH0230657U (ja) 1988-08-18 1988-08-18

Country Status (1)

Country Link
JP (1) JPH0230657U (ja)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5314406B2 (ja) * 1973-11-19 1978-05-17

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5314406B2 (ja) * 1973-11-19 1978-05-17

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