JPS58138454U - intercom device - Google Patents

intercom device

Info

Publication number
JPS58138454U
JPS58138454U JP3530582U JP3530582U JPS58138454U JP S58138454 U JPS58138454 U JP S58138454U JP 3530582 U JP3530582 U JP 3530582U JP 3530582 U JP3530582 U JP 3530582U JP S58138454 U JPS58138454 U JP S58138454U
Authority
JP
Japan
Prior art keywords
line
circuit
telephone
call
voltage
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
JP3530582U
Other languages
Japanese (ja)
Inventor
的場　信夫
内野　昌平
信哉 松倉
Original Assignee
松下電器産業株式会社
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 松下電器産業株式会社 filed Critical 松下電器産業株式会社
Priority to JP3530582U priority Critical patent/JPS58138454U/en
Publication of JPS58138454U publication Critical patent/JPS58138454U/en
Pending legal-status Critical Current

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

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図は本考案の一実施例におけるインターホン装置の
ブロック図、第２図はその要部回路の結線図である。 ３．４・・・・・・増幅器、５・・・・・・フックスイ
ッチ、６・・・・・・直流電圧送出回路、７・・・・・
・呼出検出回路、Ａ。 Ｄ・・・・・・電源ライン、Ｂ・・・・・・呼出ライン
、Ｃ・・・・・・通・話ライン、Ｐ・・・・・・秘話回
路。FIG. 1 is a block diagram of an intercom device according to an embodiment of the present invention, and FIG. 2 is a wiring diagram of its main circuits. 3.4...Amplifier, 5...Hook switch, 6...DC voltage sending circuit, 7...
・Call detection circuit, A. D...Power line, B...Call line, C...Call line, P...Secret line.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 共通の電源線、通話線および呼出線からなる線路、通話
時に上記通話線に所定の直流電圧を印加する回路、上記
直流電圧を検出して通話中であることを識別する検出回
路、この検出回路の出力により通話回路を制御して秘話
を行なう秘話回路、および上記呼出ラインを介して伝達
された呼出情報の検出によりその秘話解除を行なう解除
手段を設けたことを特徴とするインターホン装置。A line consisting of a common power supply line, a telephone line, and a calling line, a circuit that applies a predetermined DC voltage to the telephone line during a telephone call, a detection circuit that detects the DC voltage and identifies that a telephone call is in progress, and this detection circuit. 1. An intercom device comprising: a confidential communication circuit that controls a communication circuit to perform confidential communication using the output of the above-mentioned call line; and a canceling means that performs communication cancellation by detecting call information transmitted via the calling line.
JP3530582U 1982-03-12 1982-03-12 intercom device Pending JPS58138454U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3530582U JPS58138454U (en) 1982-03-12 1982-03-12 intercom device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3530582U JPS58138454U (en) 1982-03-12 1982-03-12 intercom device

Publications (1)

Publication Number Publication Date
JPS58138454U true JPS58138454U (en) 1983-09-17

Family

ID=30046785

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3530582U Pending JPS58138454U (en) 1982-03-12 1982-03-12 intercom device

Country Status (1)

Country Link
JP (1) JPS58138454U (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS542304B1 (en) * 1967-03-30 1979-02-05

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS542304B1 (en) * 1967-03-30 1979-02-05

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