JPS53143109A - Hooking detection circuit - Google Patents
Hooking detection circuitInfo
- Publication number
- JPS53143109A JPS53143109A JP5764377A JP5764377A JPS53143109A JP S53143109 A JPS53143109 A JP S53143109A JP 5764377 A JP5764377 A JP 5764377A JP 5764377 A JP5764377 A JP 5764377A JP S53143109 A JPS53143109 A JP S53143109A
- Authority
- JP
- Japan
- Prior art keywords
- detection circuit
- hooking detection
- hooking
- judgement
- call
- 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 improve the delay in the judgement of end of call, by detecting the hooking with the combination of two slow restoration relays operated relating to a response monitor relay.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5764377A JPS53143109A (en) | 1977-05-20 | 1977-05-20 | Hooking detection circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5764377A JPS53143109A (en) | 1977-05-20 | 1977-05-20 | Hooking detection circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS53143109A true JPS53143109A (en) | 1978-12-13 |
Family
ID=13061563
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5764377A Pending JPS53143109A (en) | 1977-05-20 | 1977-05-20 | Hooking detection circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS53143109A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5741369U (en) * | 1980-08-21 | 1982-03-05 | ||
JPS5839152A (en) * | 1981-09-02 | 1983-03-07 | Nec Corp | Hooking pulse detection system |
JPS58202689A (en) * | 1982-05-21 | 1983-11-25 | Nec Corp | Detecting system of push-button dial signal |
-
1977
- 1977-05-20 JP JP5764377A patent/JPS53143109A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5741369U (en) * | 1980-08-21 | 1982-03-05 | ||
JPS5839152A (en) * | 1981-09-02 | 1983-03-07 | Nec Corp | Hooking pulse detection system |
JPH0131748B2 (en) * | 1981-09-02 | 1989-06-27 | Nippon Electric Co | |
JPS58202689A (en) * | 1982-05-21 | 1983-11-25 | Nec Corp | Detecting system of push-button dial signal |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS53143109A (en) | Hooking detection circuit | |
JPS53117181A (en) | Sequence controller | |
JPS52135608A (en) | Function display unit for electronic equipment | |
JPS5417778A (en) | Synchronism testing circuit | |
JPS5411645A (en) | Picture input unit | |
JPS52123102A (en) | Workable state detection method for terminal unit | |
JPS5440098A (en) | Fire alarm | |
JPS5239327A (en) | Interface tester | |
JPS5357383A (en) | Sequencial controller | |
JPS549599A (en) | Detector for disconnection of flasher lamp | |
JPS53120309A (en) | Terminal test system | |
JPS5412296A (en) | Fire alarming apparatus | |
JPS5437234A (en) | Mult-application outgoing device | |
JPS51127767A (en) | Stopwatch device | |
JPS5429904A (en) | Monitor system of key telephone system | |
JPS53147412A (en) | Subscriber scanning system | |
JPS5441608A (en) | Operator call out system | |
JPS53120300A (en) | Alarm device | |
JPS5419149A (en) | Cigital protective relay driving system | |
JPS5291303A (en) | Checking system for development relay | |
JPS52144908A (en) | Semiconductor communicating line switch | |
JPS53116716A (en) | Line-cut confirmation system | |
JPS5393712A (en) | Malfunction preventing circuit for signal receiver | |
JPS5412522A (en) | Initial program loading system | |
JPS5413720A (en) | Communication circuit controller |