JPS55110462A - Line selection system - Google Patents
Line selection systemInfo
- Publication number
- JPS55110462A JPS55110462A JP1825579A JP1825579A JPS55110462A JP S55110462 A JPS55110462 A JP S55110462A JP 1825579 A JP1825579 A JP 1825579A JP 1825579 A JP1825579 A JP 1825579A JP S55110462 A JPS55110462 A JP S55110462A
- Authority
- JP
- Japan
- Prior art keywords
- line
- terminals
- branch
- usage
- state
- 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
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/71—Substation extension arrangements
- H04M1/715—Substation extension arrangements using two or more extensions per line
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
PURPOSE:To prevent the deterioration of transmission characteristics, without losing the flexibility of line, by providing the control switch at the branch junction point, and separating the branch line not in use from the communication line through the control of the control switch in response to the state of usage of the terminals. CONSTITUTION:The switch sections 15 and 16 are placed between the main line station side terminal of the telephone station 1, main line terminal side terminal 9 and branch line terminal 10, and the state of usage is sensed with the current sensing sections 11-14 placed at the terminals 9 and 10, for the terminals 9 and 10. Further, in response to the state of usage of the terminals 9 and 10, the switch sections 15, 16 are controlled to separate the branch lines not in use, and the deterioration of the transmission characteristics can be prevented without losing the flexibility of line.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1825579A JPS55110462A (en) | 1979-02-19 | 1979-02-19 | Line selection system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1825579A JPS55110462A (en) | 1979-02-19 | 1979-02-19 | Line selection system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55110462A true JPS55110462A (en) | 1980-08-25 |
Family
ID=11966564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1825579A Pending JPS55110462A (en) | 1979-02-19 | 1979-02-19 | Line selection system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55110462A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6399484U (en) * | 1986-12-18 | 1988-06-28 |
-
1979
- 1979-02-19 JP JP1825579A patent/JPS55110462A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6399484U (en) * | 1986-12-18 | 1988-06-28 |
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