JPS52120710A - Extension telephone system - Google Patents
Extension telephone systemInfo
- Publication number
- JPS52120710A JPS52120710A JP3812376A JP3812376A JPS52120710A JP S52120710 A JPS52120710 A JP S52120710A JP 3812376 A JP3812376 A JP 3812376A JP 3812376 A JP3812376 A JP 3812376A JP S52120710 A JPS52120710 A JP S52120710A
- Authority
- JP
- Japan
- Prior art keywords
- telephone system
- extension telephone
- extension
- telephone
- 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
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP51038123A JPS5923140B2 (en) | 1976-04-05 | 1976-04-05 | AC power line carrier expansion telephone system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP51038123A JPS5923140B2 (en) | 1976-04-05 | 1976-04-05 | AC power line carrier expansion telephone system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS52120710A true JPS52120710A (en) | 1977-10-11 |
JPS5923140B2 JPS5923140B2 (en) | 1984-05-31 |
Family
ID=12516668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP51038123A Expired JPS5923140B2 (en) | 1976-04-05 | 1976-04-05 | AC power line carrier expansion telephone system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5923140B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6172946U (en) * | 1984-10-17 | 1986-05-17 | ||
JP2005295501A (en) * | 2003-11-11 | 2005-10-20 | Sumitomo Electric Ind Ltd | Power line carrier communication system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3280259A (en) * | 1962-09-27 | 1966-10-18 | John R Cotter | Telephone repeater and portable telephone communication systems utilizing power line carrier currents |
JPS4924003A (en) * | 1972-06-26 | 1974-03-04 |
-
1976
- 1976-04-05 JP JP51038123A patent/JPS5923140B2/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3280259A (en) * | 1962-09-27 | 1966-10-18 | John R Cotter | Telephone repeater and portable telephone communication systems utilizing power line carrier currents |
JPS4924003A (en) * | 1972-06-26 | 1974-03-04 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6172946U (en) * | 1984-10-17 | 1986-05-17 | ||
JP2005295501A (en) * | 2003-11-11 | 2005-10-20 | Sumitomo Electric Ind Ltd | Power line carrier communication system |
Also Published As
Publication number | Publication date |
---|---|
JPS5923140B2 (en) | 1984-05-31 |
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