JPS647458U - - Google Patents

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Publication number
JPS647458U
JPS647458U JP10171087U JP10171087U JPS647458U JP S647458 U JPS647458 U JP S647458U JP 10171087 U JP10171087 U JP 10171087U JP 10171087 U JP10171087 U JP 10171087U JP S647458 U JPS647458 U JP S647458U
Authority
JP
Japan
Prior art keywords
circuit
logic
calling
signal
signals
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
JP10171087U
Other languages
English (en)
Other versions
JPH0638523Y2 (ja
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 JP1987101710U priority Critical patent/JPH0638523Y2/ja
Publication of JPS647458U publication Critical patent/JPS647458U/ja
Application granted granted Critical
Publication of JPH0638523Y2 publication Critical patent/JPH0638523Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【図面の簡単な説明】
第１図は本考案の実施例を示す網制御回路の回
路図、第２図は従来の網制御回路の回路図、第３
図は第１図の信号波形図である。 ２０……電話回線端子、２１……電話機端子、
２２……接点、２３……装置、２４―１，２４―
２……ペア形フオトカプラ、２７―１，２７―２
……ＡＮＤゲート、２８……ＯＲゲート、２９…
…ワンシヨツト回路、３０，３１―１，３１―２
……出力端子、Ｓｉ……呼出交流信号。

Claims (1)

  1. 【実用新案登録請求の範囲】 フアクシミリ、データ端末等の装置において回
    線の直流ループ電流及び呼出交流信号に応じた２
    つの論理信号を出力する検出回路と、 前記２つの論理和信号の論理和をとる論理回路
    と、 前記呼出交流信号の周期よりも長い時定数を有
    し前記論理回路の出力でトリガされるワンシヨツ
    ト回路とを、 備えたことを特徴とする網制御回路。
JP1987101710U 1987-07-01 1987-07-01 網制御回路 Expired - Lifetime JPH0638523Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987101710U JPH0638523Y2 (ja) 1987-07-01 1987-07-01 網制御回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987101710U JPH0638523Y2 (ja) 1987-07-01 1987-07-01 網制御回路

Publications (2)

Publication Number Publication Date
JPS647458U true JPS647458U (ja) 1989-01-17
JPH0638523Y2 JPH0638523Y2 (ja) 1994-10-05

Family

ID=31330954

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987101710U Expired - Lifetime JPH0638523Y2 (ja) 1987-07-01 1987-07-01 網制御回路

Country Status (1)

Country Link
JP (1) JPH0638523Y2 (ja)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57112196A (en) * 1980-12-29 1982-07-13 Fujitsu Ltd Ringing detection circuit
JPS58219863A (ja) * 1982-06-14 1983-12-21 Ricoh Co Ltd 呼出信号検出装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57112196A (en) * 1980-12-29 1982-07-13 Fujitsu Ltd Ringing detection circuit
JPS58219863A (ja) * 1982-06-14 1983-12-21 Ricoh Co Ltd 呼出信号検出装置

Also Published As

Publication number Publication date
JPH0638523Y2 (ja) 1994-10-05

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