JPH03111050U - - Google Patents
Info
- Publication number
- JPH03111050U JPH03111050U JP1972090U JP1972090U JPH03111050U JP H03111050 U JPH03111050 U JP H03111050U JP 1972090 U JP1972090 U JP 1972090U JP 1972090 U JP1972090 U JP 1972090U JP H03111050 U JPH03111050 U JP H03111050U
- Authority
- JP
- Japan
- Prior art keywords
- telephone
- hook
- line
- section
- telephones
- 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
- 238000001514 detection method Methods 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 3
Description
第１図は本考案によるブランチ接続電話機の秘
話装置の一実施例を示した要部ブロツク図、第２
図は従来のブランチ接続を示した要部ブロツク図
である。
図中、１……電話機、２……フツクスイツチ、
３……スイツチ回路、４……フオトカプラ、５…
…制御部、６……電話回線、１２……ブランチ接
続回路、１３，１４，１５……電話機である。
FIG. 1 is a block diagram of the main parts showing an embodiment of a secret device for a branch-connected telephone according to the present invention, and FIG.
The figure is a main part block diagram showing a conventional branch connection. In the diagram, 1... telephone, 2... switch,
3...Switch circuit, 4...Photocoupler, 5...
. . . control unit, 6 . . . telephone line, 12 . . . branch connection circuit, 13, 14, 15 . . . telephone set.
Claims (1)
チ接続された複数の電話機において、各電話機の
オフフツクを検出するオフフツク検出部と、各電
話機を回線より遮断するスイツチ部と、前記オフ
フツク検出部よりの検出信号に基づき、オフフツ
ク検出信号を出力した電話機以外の電話機のスイ
ツチ部を制御する制御部とで構成されたブランチ
接続電話機の秘話装置。 In a plurality of telephones branch-connected to any one line of a public line or an exchange, an off-hook detection section detects off-hook of each telephone, a switch section that disconnects each telephone from the line, and a detection signal from the off-hook detection section. and a control section for controlling the switch sections of telephones other than the telephone that outputs the off-hook detection signal, based on the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1972090U JPH03111050U (en) | 1990-02-28 | 1990-02-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1972090U JPH03111050U (en) | 1990-02-28 | 1990-02-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03111050U true JPH03111050U (en) | 1991-11-14 |
Family
ID=31522824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1972090U Pending JPH03111050U (en) | 1990-02-28 | 1990-02-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03111050U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100814286B1 (en) * | 2007-02-20 | 2008-03-18 | 이안제 | A dry stand for laundry |
-
1990
- 1990-02-28 JP JP1972090U patent/JPH03111050U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100814286B1 (en) * | 2007-02-20 | 2008-03-18 | 이안제 | A dry stand for laundry |