JPS54105416A - Hand-free talking system of key telephone set - Google Patents
Hand-free talking system of key telephone setInfo
- Publication number
- JPS54105416A JPS54105416A JP1189678A JP1189678A JPS54105416A JP S54105416 A JPS54105416 A JP S54105416A JP 1189678 A JP1189678 A JP 1189678A JP 1189678 A JP1189678 A JP 1189678A JP S54105416 A JPS54105416 A JP S54105416A
- Authority
- JP
- Japan
- Prior art keywords
- telephone set
- counter circuit
- circuit
- hand
- flop
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/02—Arrangements for interconnection not involving centralised switching involving a common line for all parties
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1189678A JPS5919519B2 (ja) | 1978-02-07 | 1978-02-07 | ボタン電話装置におけるハンドフリ−通話方式 |
US06/006,519 US4280022A (en) | 1978-02-07 | 1979-01-25 | Key telephone systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1189678A JPS5919519B2 (ja) | 1978-02-07 | 1978-02-07 | ボタン電話装置におけるハンドフリ−通話方式 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54105416A true JPS54105416A (en) | 1979-08-18 |
JPS5919519B2 JPS5919519B2 (ja) | 1984-05-07 |
Family
ID=11790480
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1189678A Expired JPS5919519B2 (ja) | 1978-02-07 | 1978-02-07 | ボタン電話装置におけるハンドフリ−通話方式 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5919519B2 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60244140A (ja) * | 1984-05-18 | 1985-12-04 | Tamura Electric Works Ltd | 機能電話機 |
-
1978
- 1978-02-07 JP JP1189678A patent/JPS5919519B2/ja not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60244140A (ja) * | 1984-05-18 | 1985-12-04 | Tamura Electric Works Ltd | 機能電話機 |
JPH0224062B2 (ja) * | 1984-05-18 | 1990-05-28 | Tamura Electric Works Ltd |
Also Published As
Publication number | Publication date |
---|---|
JPS5919519B2 (ja) | 1984-05-07 |
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