JPH02907B2 - - Google Patents
Info
- Publication number
- JPH02907B2 JPH02907B2 JP55100789A JP10078980A JPH02907B2 JP H02907 B2 JPH02907 B2 JP H02907B2 JP 55100789 A JP55100789 A JP 55100789A JP 10078980 A JP10078980 A JP 10078980A JP H02907 B2 JPH02907 B2 JP H02907B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- sending
- subscriber
- hook
- 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.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims description 17
- 239000003990 capacitor Substances 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/02—Calling substations, e.g. by ringing
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10078980A JPS5725759A (en) | 1980-07-23 | 1980-07-23 | Ring tripping circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10078980A JPS5725759A (en) | 1980-07-23 | 1980-07-23 | Ring tripping circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5725759A JPS5725759A (en) | 1982-02-10 |
JPH02907B2 true JPH02907B2 (fr) | 1990-01-09 |
Family
ID=14283199
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10078980A Granted JPS5725759A (en) | 1980-07-23 | 1980-07-23 | Ring tripping circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5725759A (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2531296B1 (fr) * | 1982-07-30 | 1988-04-15 | Cit Alcatel | Procede et dispositif de detection de boucle en phase sonnerie |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5291614A (en) * | 1976-01-28 | 1977-08-02 | Fujitsu Ltd | Correcting quality of printed characters in printer |
JPS5391614A (en) * | 1977-01-24 | 1978-08-11 | Nec Corp | Ring trip circuit |
-
1980
- 1980-07-23 JP JP10078980A patent/JPS5725759A/ja active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5291614A (en) * | 1976-01-28 | 1977-08-02 | Fujitsu Ltd | Correcting quality of printed characters in printer |
JPS5391614A (en) * | 1977-01-24 | 1978-08-11 | Nec Corp | Ring trip circuit |
Also Published As
Publication number | Publication date |
---|---|
JPS5725759A (en) | 1982-02-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPH0856265A (ja) | 通信システム及びスイッチングユニット | |
EP0178993A2 (fr) | Configuration du circuit d'entrée pour un circuit d'interface d'une ligne d'abonné | |
EP0083602A1 (fr) | Unite de connexion pour un bus annulaire | |
US4150260A (en) | Subscriber's circuit for four-wire-system local switch | |
JPH04233891A (ja) | ボタン電話用インタフェース装置 | |
JPH02907B2 (fr) | ||
JPS6251018B2 (fr) | ||
SE443270B (sv) | Konferenskrets | |
US4006307A (en) | Impulse noise suppression circuit | |
JPH0224063B2 (fr) | ||
JPS6259500B2 (fr) | ||
JPS584294Y2 (ja) | 呼出信号の送出制御回路 | |
JP2511695B2 (ja) | 加入者状態監視装置 | |
JPS5827578Y2 (ja) | 加入者ル−プ監視装置 | |
JP4023009B2 (ja) | 端末網制御装置 | |
JPS62122449A (ja) | リンガ送出回路 | |
JP2000050321A (ja) | 2線式加入者回路の障害検出回路 | |
JPS61264853A (ja) | 端末装置 | |
JPH0411152B2 (fr) | ||
JPH0252552A (ja) | 電話交換装置の停電対策回路 | |
JPS6182563A (ja) | リングトリツプ装置 | |
JPS583451A (ja) | 交流検出リングトリツプ回路 | |
JPH0435956B2 (fr) | ||
JPH0473661B2 (fr) | ||
JPS5823037B2 (ja) | コウカンカイロ |