JPS52122015A - Line signal supervisor - Google Patents
Line signal supervisorInfo
- Publication number
- JPS52122015A JPS52122015A JP3838776A JP3838776A JPS52122015A JP S52122015 A JPS52122015 A JP S52122015A JP 3838776 A JP3838776 A JP 3838776A JP 3838776 A JP3838776 A JP 3838776A JP S52122015 A JPS52122015 A JP S52122015A
- Authority
- JP
- Japan
- Prior art keywords
- line signal
- voltage
- signal supervisor
- supervisor
- battery
- 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
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
Abstract
PURPOSE:To detect the line signal by comparing the voltage at the channel side of the resistance reducing the voltage by DC, that the earth potential and the battery coltage are supplied to the channel respectively with the battery and the voltage across the earth.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3838776A JPS52122015A (en) | 1976-04-06 | 1976-04-06 | Line signal supervisor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3838776A JPS52122015A (en) | 1976-04-06 | 1976-04-06 | Line signal supervisor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS52122015A true JPS52122015A (en) | 1977-10-13 |
Family
ID=12523857
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3838776A Pending JPS52122015A (en) | 1976-04-06 | 1976-04-06 | Line signal supervisor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS52122015A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56156087A (en) * | 1980-05-06 | 1981-12-02 | Nec Corp | Loop detecting circuit |
-
1976
- 1976-04-06 JP JP3838776A patent/JPS52122015A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56156087A (en) * | 1980-05-06 | 1981-12-02 | Nec Corp | Loop detecting circuit |
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