JPS5948169U - Busy detection circuit - Google Patents

Busy detection circuit

Info

Publication number
JPS5948169U
JPS5948169U JP14311382U JP14311382U JPS5948169U JP S5948169 U JPS5948169 U JP S5948169U JP 14311382 U JP14311382 U JP 14311382U JP 14311382 U JP14311382 U JP 14311382U JP S5948169 U JPS5948169 U JP S5948169U
Authority
JP
Japan
Prior art keywords
detection circuit
telephone line
busy detection
circuit
parallel
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
JP14311382U
Other languages
Japanese (ja)
Inventor
繁男 塚本
隆 加藤
Original Assignee
株式会社大興電機製作所
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 株式会社大興電機製作所 filed Critical 株式会社大興電機製作所
Priority to JP14311382U priority Critical patent/JPS5948169U/en
Publication of JPS5948169U publication Critical patent/JPS5948169U/en
Pending 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) [Summary] 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 the drawing]

第１図は自動通報装置のブロック図、第２図は本考案を
実施した通話中検出回路である。 Ｔ・・・電話機、Ｍ・・・通報回路、Ｂ・・・通話中検
出回路、ＶＳ・・・バリスター、ＰＣＩ、ＰＣ２・・・
ホトカプラ。FIG. 1 is a block diagram of an automatic reporting device, and FIG. 2 is a busy detection circuit implementing the present invention. T...Telephone, M...Notification circuit, B...During call detection circuit, VS...Varistor, PCI, PC2...
Photocoupler.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 電話機が接続されている電話回線を分岐することによっ
て同一の電話回線を共用するようにした装置において、
上記分岐された電話機側の通話線の一方にバリスターと
抵抗の並列回路を挿入するとともにその両端に互に異な
る方向でホトカプラを並列に接続したことを特徴とする
通話中検出回路。In a device that allows telephones to share the same telephone line by branching the telephone line to which they are connected,
A call detection circuit characterized in that a parallel circuit of a varistor and a resistor is inserted into one side of the branched telephone line, and photocouplers are connected in parallel to both ends of the circuit in different directions.
JP14311382U 1982-09-21 1982-09-21 Busy detection circuit Pending JPS5948169U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14311382U JPS5948169U (en) 1982-09-21 1982-09-21 Busy detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14311382U JPS5948169U (en) 1982-09-21 1982-09-21 Busy detection circuit

Publications (1)

Publication Number Publication Date
JPS5948169U true JPS5948169U (en) 1984-03-30

Family

ID=30319551

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14311382U Pending JPS5948169U (en) 1982-09-21 1982-09-21 Busy detection circuit

Country Status (1)

Country Link
JP (1) JPS5948169U (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55134568A (en) * 1979-04-06 1980-10-20 Nippon Telegr & Teleph Corp <Ntt> Data collector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55134568A (en) * 1979-04-06 1980-10-20 Nippon Telegr & Teleph Corp <Ntt> Data collector

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