JPS5279708A - Key telephone system - Google Patents
Key telephone systemInfo
- Publication number
- JPS5279708A JPS5279708A JP15672775A JP15672775A JPS5279708A JP S5279708 A JPS5279708 A JP S5279708A JP 15672775 A JP15672775 A JP 15672775A JP 15672775 A JP15672775 A JP 15672775A JP S5279708 A JPS5279708 A JP S5279708A
- Authority
- JP
- Japan
- Prior art keywords
- telephone system
- key telephone
- thru
- expenses
- outgoing
- 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)
Abstract
PURPOSE:To save the expenses such as construction works, by enabling the station arrival, display, response communication, and outgoing, thru the use of the cable having fewer number of core wires than conventional systems.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15672775A JPS5279708A (en) | 1975-12-26 | 1975-12-26 | Key telephone system |
US05/967,017 US4254306A (en) | 1975-12-26 | 1978-12-06 | Key telephone system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15672775A JPS5279708A (en) | 1975-12-26 | 1975-12-26 | Key telephone system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5279708A true JPS5279708A (en) | 1977-07-05 |
JPS5440405B2 JPS5440405B2 (en) | 1979-12-03 |
Family
ID=15634001
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15672775A Granted JPS5279708A (en) | 1975-12-26 | 1975-12-26 | Key telephone system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5279708A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52104008A (en) * | 1976-02-27 | 1977-09-01 | Taiko Denki Seisakusho:Kk | Connecting method of button telephone apparatus |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5051507U (en) * | 1973-09-07 | 1975-05-19 |
-
1975
- 1975-12-26 JP JP15672775A patent/JPS5279708A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5051507U (en) * | 1973-09-07 | 1975-05-19 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52104008A (en) * | 1976-02-27 | 1977-09-01 | Taiko Denki Seisakusho:Kk | Connecting method of button telephone apparatus |
JPS5522987B2 (en) * | 1976-02-27 | 1980-06-20 |
Also Published As
Publication number | Publication date |
---|---|
JPS5440405B2 (en) | 1979-12-03 |
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