JPS526007A - Detection system of the off-hook stgnal of a called subscriber - Google Patents
Detection system of the off-hook stgnal of a called subscriberInfo
- Publication number
- JPS526007A JPS526007A JP8183775A JP8183775A JPS526007A JP S526007 A JPS526007 A JP S526007A JP 8183775 A JP8183775 A JP 8183775A JP 8183775 A JP8183775 A JP 8183775A JP S526007 A JPS526007 A JP S526007A
- Authority
- JP
- Japan
- Prior art keywords
- detection system
- called subscriber
- hook
- stgnal
- shall
- 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:In a detection system of the off-hook signal of a called subscriber at a four-wire telephone office, the miniaturization and the simplification shall be planned by performing this detection without a relay circuit and the occurrence of the swiching-office noise shall be reduced by constituting the circuit parallel to the earth.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8183775A JPS526007A (en) | 1975-07-04 | 1975-07-04 | Detection system of the off-hook stgnal of a called subscriber |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8183775A JPS526007A (en) | 1975-07-04 | 1975-07-04 | Detection system of the off-hook stgnal of a called subscriber |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS526007A true JPS526007A (en) | 1977-01-18 |
Family
ID=13757571
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8183775A Pending JPS526007A (en) | 1975-07-04 | 1975-07-04 | Detection system of the off-hook stgnal of a called subscriber |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS526007A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5016707U (en) * | 1973-06-11 | 1975-02-22 |
-
1975
- 1975-07-04 JP JP8183775A patent/JPS526007A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5016707U (en) * | 1973-06-11 | 1975-02-22 |
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