JPS58138454U - intercom device - Google Patents
intercom deviceInfo
- 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
Links
Landscapes
- 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
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)
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS542304B1 (en) * | 1967-03-30 | 1979-02-05 |
-
1982
- 1982-03-12 JP JP3530582U patent/JPS58138454U/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS542304B1 (en) * | 1967-03-30 | 1979-02-05 |
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