JPH0366256U - - Google Patents
Info
- Publication number
- JPH0366256U JPH0366256U JP12388689U JP12388689U JPH0366256U JP H0366256 U JPH0366256 U JP H0366256U JP 12388689 U JP12388689 U JP 12388689U JP 12388689 U JP12388689 U JP 12388689U JP H0366256 U JPH0366256 U JP H0366256U
- Authority
- JP
- Japan
- Prior art keywords
- telephone
- telephone set
- state
- circuit
- notification
- 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
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
Description
第１図は本考案の電話機の秘話喪失状態告知回
路のブロツク図、第２図は電話機のブランチ接続
回路図である。
１……電話回線接続端子、２……フツキング回
路、３……従来電話回路、４……受話スピーカ、
５……送話マイク、６……電圧変動検出回路、７
……中央制御部、８……表示ドライバ回路、９…
…表示素子、１０……アラーム回路、１１……ア
ラームスピーカ、１２……ブランチソケツト、１
３，１４……電話機Ａ，Ｂ、１５……電話回線接
続端子、１６，１７……電話機接続端子。
FIG. 1 is a block diagram of a privacy loss state notification circuit of a telephone according to the present invention, and FIG. 2 is a branch connection circuit diagram of the telephone. 1... Telephone line connection terminal, 2... Footing circuit, 3... Conventional telephone circuit, 4... Receiving speaker,
5... Transmission microphone, 6... Voltage fluctuation detection circuit, 7
...Central control unit, 8...Display driver circuit, 9...
... Display element, 10 ... Alarm circuit, 11 ... Alarm speaker, 12 ... Branch socket, 1
3, 14...Telephones A, B, 15...Telephone line connection terminal, 16, 17...Telephone connection terminal.
Claims (1)
器において、他の電話器のオフ・フツク状態或い
は通話状態にあることを電話回線の電圧変動によ
り検出し、秘話状態にないことを通話中の電話器
上に表示器或いは音響発生器により告知すること
を特徴とする電話機の秘話喪失状態告知回路。 In a telephone set where multiple telephone sets are connected in a branch, it is possible to detect whether another telephone set is off-hook or in a talking state by voltage fluctuations on the telephone line, and to detect that the telephone set is not in a confidential state. 1. A communication loss state notification circuit for a telephone, characterized in that a notification is made by a display or a sound generator on the top of the telephone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12388689U JPH0366256U (en) | 1989-10-23 | 1989-10-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12388689U JPH0366256U (en) | 1989-10-23 | 1989-10-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0366256U true JPH0366256U (en) | 1991-06-27 |
Family
ID=31671839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12388689U Pending JPH0366256U (en) | 1989-10-23 | 1989-10-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0366256U (en) |
-
1989
- 1989-10-23 JP JP12388689U patent/JPH0366256U/ja active Pending
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