JPS57162861A - Button telephone set - Google Patents
Button telephone setInfo
- Publication number
- JPS57162861A JPS57162861A JP4872481A JP4872481A JPS57162861A JP S57162861 A JPS57162861 A JP S57162861A JP 4872481 A JP4872481 A JP 4872481A JP 4872481 A JP4872481 A JP 4872481A JP S57162861 A JPS57162861 A JP S57162861A
- Authority
- JP
- Japan
- Prior art keywords
- telephone set
- line
- circuit
- telephone
- audio
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
- H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4872481A JPS57162861A (en) | 1981-03-31 | 1981-03-31 | Button telephone set |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4872481A JPS57162861A (en) | 1981-03-31 | 1981-03-31 | Button telephone set |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57162861A true JPS57162861A (en) | 1982-10-06 |
Family
ID=12811235
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4872481A Pending JPS57162861A (en) | 1981-03-31 | 1981-03-31 | Button telephone set |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57162861A (ja) |
-
1981
- 1981-03-31 JP JP4872481A patent/JPS57162861A/ja active Pending
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