JPS63156136U - - Google Patents

Info

Publication number
JPS63156136U
JPS63156136U JP4977787U JP4977787U JPS63156136U JP S63156136 U JPS63156136 U JP S63156136U JP 4977787 U JP4977787 U JP 4977787U JP 4977787 U JP4977787 U JP 4977787U JP S63156136 U JPS63156136 U JP S63156136U
Authority
JP
Japan
Prior art keywords
call detection
circuit
voltage
incoming
photocoupler
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
JP4977787U
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 JP4977787U priority Critical patent/JPS63156136U/ja
Publication of JPS63156136U publication Critical patent/JPS63156136U/ja
Pending legal-status Critical Current

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  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Description

【図面の簡単な説明】
第1図は本考案一実施例の回路図、第2図は本
考案に係る電話着信検出回路を具備した多機能電
話の概略構成を示すブロツク回路図、第3図は従
来例の回路図である。 L,Lは電話回線、DBは全波整流回路
、rはスイツチ要素たるリレー接点、TCは電話
着信検出回路、HCは保留回路、PCはフオトカ
プラ、ZDはツエナダイオードである。

Claims (1)

    【実用新案登録請求の範囲】
  1. 電話回線に全波整流回路を接続し、上記全波整
    流回路の出力側に、保留制御用のスイツチ要素を
    介して保留回路を並列接続するとともに、着信検
    出用のツエナダイオードと着信信号出力用のフオ
    トカプラの発光ダイオードとの直列回路を並列接
    続し、ツエナダイオードのツエナ電圧を電話回線
    の通常時の電圧よりも高く、着信時の電圧よりも
    低く設定し、フオトカプラのフオトトランジスタ
    出力を着信検出信号としたことを特徴とする電話
    着信検出回路。
JP4977787U 1987-03-31 1987-03-31 Pending JPS63156136U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4977787U JPS63156136U (ja) 1987-03-31 1987-03-31

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4977787U JPS63156136U (ja) 1987-03-31 1987-03-31

Publications (1)

Publication Number Publication Date
JPS63156136U true JPS63156136U (ja) 1988-10-13

Family

ID=30872542

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4977787U Pending JPS63156136U (ja) 1987-03-31 1987-03-31

Country Status (1)

Country Link
JP (1) JPS63156136U (ja)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61141239A (ja) * 1984-12-13 1986-06-28 Fujitsu Ten Ltd 電話装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61141239A (ja) * 1984-12-13 1986-06-28 Fujitsu Ten Ltd 電話装置

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