JPS583657U - Polarity detection circuit of terminal equipment - Google Patents

Polarity detection circuit of terminal equipment

Info

Publication number
JPS583657U
JPS583657U JP9547581U JP9547581U JPS583657U JP S583657 U JPS583657 U JP S583657U JP 9547581 U JP9547581 U JP 9547581U JP 9547581 U JP9547581 U JP 9547581U JP S583657 U JPS583657 U JP S583657U
Authority
JP
Japan
Prior art keywords
polarity detection
detection circuit
terminal equipment
subscriber line
polarity
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.)
Granted
Application number
JP9547581U
Other languages
Japanese (ja)
Other versions
JPS641811Y2 (en
Inventor
真柴　実
山本　睦博
岡田　厚
Original Assignee
株式会社田村電機製作所
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 株式会社田村電機製作所 filed Critical 株式会社田村電機製作所
Priority to JP9547581U priority Critical patent/JPS583657U/en
Publication of JPS583657U publication Critical patent/JPS583657U/en
Application granted granted Critical
Publication of JPS641811Y2 publication Critical patent/JPS641811Y2/ja
Granted legal-status Critical Current

Links

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図は従来例の回路図、第２図は本考案の実施例を示
す回路図、第３図は第２図における各部の波形を示すタ
イミングチャートである。 Ｌｌ、　Ｌ２・・・・・・線路端子、ＣＮＴ・・・・・
・制御部、Ｌ、　　　−Ａ　、　Ｂ　ＩＩ＠１１＠＠＠
リレー、１０，１１．ａｌ、ｂｌ・・・・・・接点、Ｐ
ＤＴ−・・・・・極性検出部、ＴＩＭ・・・・・・タイ
マー。FIG. 1 is a circuit diagram of a conventional example, FIG. 2 is a circuit diagram showing an embodiment of the present invention, and FIG. 3 is a timing chart showing waveforms of various parts in FIG. Ll, L2...Line terminal, CNT...
・Control unit, L, -A, B II@11@@@
Relay, 10, 11. al, bl...Contact, P
DT-...Polarity detection unit, TIM...Timer.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 加入者回線に対し直列として挿入された方向性素子によ
り、前記加入者回線に印加される電圧の極性を検出する
端末機器においてミ前記方向性素子を含む極性検出部と
、前記加入者回線に対する直流ループ閉成に応じて起動
し所定時間後のタイムアツプ出力が生ずるまでの間前記
極性検出部の動作を無効とするタイマーとを備えたこと
を特徴とする端末機器の極性検出回路。In a terminal device that detects the polarity of a voltage applied to the subscriber line by a directional element inserted in series with the subscriber line, a polarity detection unit including the directional element and a direct current to the subscriber line 1. A polarity detection circuit for a terminal device, comprising: a timer that is activated in response to loop closure and disables the operation of the polarity detection section until a time-up output is generated after a predetermined period of time.
JP9547581U 1981-06-27 1981-06-27 Polarity detection circuit of terminal equipment Granted JPS583657U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9547581U JPS583657U (en) 1981-06-27 1981-06-27 Polarity detection circuit of terminal equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9547581U JPS583657U (en) 1981-06-27 1981-06-27 Polarity detection circuit of terminal equipment

Publications (2)

Publication Number Publication Date
JPS583657U true JPS583657U (en) 1983-01-11
JPS641811Y2 JPS641811Y2 (en) 1989-01-17

Family

ID=29890379

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9547581U Granted JPS583657U (en) 1981-06-27 1981-06-27 Polarity detection circuit of terminal equipment

Country Status (1)

Country Link
JP (1) JPS583657U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59161959A (en) * 1983-03-07 1984-09-12 Nippon Resuko:Kk Method and device for recovery of telephone terminal device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS513705A (en) * 1974-06-28 1976-01-13 Taiko Electric Works Ltd DEETATANMATSUSOCHITONO OTOKAKUNINHOSHIKI
JPS5533515U (en) * 1978-08-23 1980-03-04
JPS5555659A (en) * 1979-10-22 1980-04-23 Ricoh Co Ltd Failure prevention system for facsimile unit
JPS5643859A (en) * 1979-09-18 1981-04-22 Tamura Electric Works Ltd Polarity-inversion-signal detecting circuit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5280518A (en) * 1975-12-26 1977-07-06 Aisin Seiki Valve device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS513705A (en) * 1974-06-28 1976-01-13 Taiko Electric Works Ltd DEETATANMATSUSOCHITONO OTOKAKUNINHOSHIKI
JPS5533515U (en) * 1978-08-23 1980-03-04
JPS5643859A (en) * 1979-09-18 1981-04-22 Tamura Electric Works Ltd Polarity-inversion-signal detecting circuit
JPS5555659A (en) * 1979-10-22 1980-04-23 Ricoh Co Ltd Failure prevention system for facsimile unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59161959A (en) * 1983-03-07 1984-09-12 Nippon Resuko:Kk Method and device for recovery of telephone terminal device

Also Published As

Publication number Publication date
JPS641811Y2 (en) 1989-01-17

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