JPS6114560U - Public telephone incoming call detection circuit - Google Patents

Public telephone incoming call detection circuit

Info

Publication number
JPS6114560U
JPS6114560U JP9610484U JP9610484U JPS6114560U JP S6114560 U JPS6114560 U JP S6114560U JP 9610484 U JP9610484 U JP 9610484U JP 9610484 U JP9610484 U JP 9610484U JP S6114560 U JPS6114560 U JP S6114560U
Authority
JP
Japan
Prior art keywords
light
detection circuit
incoming call
public telephone
call detection
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
JP9610484U
Other languages
Japanese (ja)
Other versions
JPH0314860Y2 (en
Inventor
栄司 是安
和夫 浅田
修 篠原
幸雄 植木
Original Assignee
株式会社田村電機製作所
日本電信電話株式会社
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, 日本電信電話株式会社 filed Critical 株式会社田村電機製作所
Priority to JP9610484U priority Critical patent/JPS6114560U/en
Publication of JPS6114560U publication Critical patent/JPS6114560U/en
Application granted granted Critical
Publication of JPH0314860Y2 publication Critical patent/JPH0314860Y2/ja
Granted legal-status Critical Current

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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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】 図は本考案の実施例を示す回路図である。 ｈ，、一・・・・・・線路端子、ＨＳＩ， ＨＳ２・・
・・・・フッ−クスイツチ、ＴＫＣ・・・・・・通話回
路、Ｃ〜Ｃ３・・・・・・コンデンサ、ＤＢ・・・・・
・ダイ牙一ドブリッジ回路、Ｄ１〜Ｄ６・・・・・・ダ
イオード、Ｒ１−Ｒ２・・・・・・抵抗器、ＺＤよ，Ｚ
Ｄ２・・・・・・定電圧ダイオード、ＰＣ・・・・・・
フォトカプラ、ＣＮＴ・・・・・・制御部。BRIEF DESCRIPTION OF THE DRAWINGS The figure is a circuit diagram showing an embodiment of the present invention. h, 1...Line terminal, HSI, HS2...
...Hook switch, TKC...Telephone circuit, C-C3...Capacitor, DB...
・Diode bridge circuit, D1-D6...Diode, R1-R2...Resistor, ZD, Z
D2... Constant voltage diode, PC...
Photocoupler, CNT...Control unit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 先ループ方式の公衆電話機において、呼出信号の到来に
より充電されるコンデン−サと、該コンデンサの充電々
荷により発光する発光素子と、該発光素子の発光を受光
する受光素子と、オフフックによるループ電流の流通に
応じて動作状態となり前記受光素子の状態により着信を
判断する制御部・、とを設けたととを特徴とする公衆電
話機の着信検、 ， 知回路。In front-loop public telephones, there is a capacitor that is charged when a calling signal arrives, a light-emitting element that emits light due to the charge of the capacitor, a light-receiving element that receives the light emitted from the light-emitting element, and a loop current due to off-hook. An incoming call detection/detection circuit for a public telephone set, comprising: a control unit that becomes operational in accordance with the circulation of the light receiving element and determines incoming calls based on the state of the light receiving element.
JP9610484U 1984-06-28 1984-06-28 Public telephone incoming call detection circuit Granted JPS6114560U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9610484U JPS6114560U (en) 1984-06-28 1984-06-28 Public telephone incoming call detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9610484U JPS6114560U (en) 1984-06-28 1984-06-28 Public telephone incoming call detection circuit

Publications (2)

Publication Number Publication Date
JPS6114560U true JPS6114560U (en) 1986-01-28
JPH0314860Y2 JPH0314860Y2 (en) 1991-04-02

Family

ID=30655436

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9610484U Granted JPS6114560U (en) 1984-06-28 1984-06-28 Public telephone incoming call detection circuit

Country Status (1)

Country Link
JP (1) JPS6114560U (en)

Also Published As

Publication number Publication date
JPH0314860Y2 (en) 1991-04-02

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