JPS52142905A - Control device of telephone call current supply - Google Patents
Control device of telephone call current supplyInfo
- Publication number
- JPS52142905A JPS52142905A JP5909676A JP5909676A JPS52142905A JP S52142905 A JPS52142905 A JP S52142905A JP 5909676 A JP5909676 A JP 5909676A JP 5909676 A JP5909676 A JP 5909676A JP S52142905 A JPS52142905 A JP S52142905A
- Authority
- JP
- Japan
- Prior art keywords
- control device
- current supply
- telephone call
- call current
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Abstract
PURPOSE:To improve the bad influence due to the external inductive noise by electrically insulating between the control circuit of the switchboard equipment and the terminal telephone set in case of the telephone on the train.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5909676A JPS52142905A (en) | 1976-05-24 | 1976-05-24 | Control device of telephone call current supply |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5909676A JPS52142905A (en) | 1976-05-24 | 1976-05-24 | Control device of telephone call current supply |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS52142905A true JPS52142905A (en) | 1977-11-29 |
Family
ID=13103448
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5909676A Pending JPS52142905A (en) | 1976-05-24 | 1976-05-24 | Control device of telephone call current supply |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS52142905A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54159114A (en) * | 1978-06-02 | 1979-12-15 | Cselt Centro Studi Lab Telecom | Electronic telephone circuit for subscriber channel |
-
1976
- 1976-05-24 JP JP5909676A patent/JPS52142905A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54159114A (en) * | 1978-06-02 | 1979-12-15 | Cselt Centro Studi Lab Telecom | Electronic telephone circuit for subscriber channel |
JPS5853542B2 (en) * | 1978-06-02 | 1983-11-30 | シ エツセ エ エレ チ−セントロ ステユデイ エ ラボラトリ テレコミニカチオ−ニ エツセ ピ− ア− | Electronic telephone circuit for subscriber lines |
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