JPS571171B2 - - Google Patents
Info
- Publication number
- JPS571171B2 JPS571171B2 JP13314675A JP13314675A JPS571171B2 JP S571171 B2 JPS571171 B2 JP S571171B2 JP 13314675 A JP13314675 A JP 13314675A JP 13314675 A JP13314675 A JP 13314675A JP S571171 B2 JPS571171 B2 JP S571171B2
- Authority
- JP
- Japan
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/026—Arrangements for interrupting the ringing current
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Interface Circuits In Exchanges (AREA)
- Exchange Systems With Centralized Control (AREA)
- Plural Heterocyclic Compounds (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/521,651 US3978292A (en) | 1974-11-07 | 1974-11-07 | Ringing control circuitry with shared ringing loop current detector |
| US05/521,734 US3978293A (en) | 1974-11-07 | 1974-11-07 | Ringing control circuitry with shared ringing loop current detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5169906A JPS5169906A (ja) | 1976-06-17 |
| JPS571171B2 true JPS571171B2 (pt) | 1982-01-09 |
Family
ID=27060535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13314675A Granted JPS5169906A (ja) | 1974-11-07 | 1975-11-07 | Yobidashishingoseigyokairo |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5169906A (pt) |
| BR (1) | BR7507193A (pt) |
| DE (1) | DE2549469C2 (pt) |
| ES (1) | ES442422A1 (pt) |
| FR (1) | FR2290805A1 (pt) |
| GB (1) | GB1515720A (pt) |
| IT (1) | IT1048758B (pt) |
| NL (1) | NL7513016A (pt) |
| SE (1) | SE7512060L (pt) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2755639C2 (de) * | 1977-12-14 | 1985-06-05 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Schaltungsanordnung zur logischen Verarbeitung von Teilnehmer-Kriterien in Fernmelde-, insbesondere Fernsprechvermittlungsanlagen |
| FR2451682A1 (fr) * | 1979-03-12 | 1980-10-10 | Jeumont Schneider | Dispositif d'appel pour installation telephonique automatique d'abonne avec postes supplementaires |
| JPS56119565A (en) * | 1981-02-12 | 1981-09-19 | Hitachi Ltd | Signal processing device in subscriber's circuit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3720793A (en) * | 1971-09-01 | 1973-03-13 | Bell Telephone Labor Inc | Supervisory circuit arrangement for telephone subscriber lines |
| FR2171594A5 (pt) * | 1972-02-08 | 1973-09-21 | Constr Telephoniques | |
| FR2172537A5 (pt) * | 1972-02-17 | 1973-09-28 | Constr Telephoniques |
-
1975
- 1975-10-28 SE SE7512060A patent/SE7512060L/ unknown
- 1975-10-31 BR BR7507193A patent/BR7507193A/pt unknown
- 1975-11-03 IT IT2897675A patent/IT1048758B/it active
- 1975-11-03 FR FR7533546A patent/FR2290805A1/fr active Granted
- 1975-11-05 DE DE19752549469 patent/DE2549469C2/de not_active Expired
- 1975-11-06 GB GB4601575A patent/GB1515720A/en not_active Expired
- 1975-11-06 NL NL7513016A patent/NL7513016A/xx not_active Application Discontinuation
- 1975-11-07 ES ES442422A patent/ES442422A1/es not_active Expired
- 1975-11-07 JP JP13314675A patent/JPS5169906A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| ES442422A1 (es) | 1977-08-16 |
| FR2290805A1 (fr) | 1976-06-04 |
| GB1515720A (en) | 1978-06-28 |
| DE2549469A1 (de) | 1976-05-13 |
| BR7507193A (pt) | 1976-08-10 |
| JPS5169906A (ja) | 1976-06-17 |
| FR2290805B1 (pt) | 1981-02-06 |
| SE7512060L (sv) | 1976-05-10 |
| DE2549469C2 (de) | 1984-05-17 |
| NL7513016A (nl) | 1976-05-11 |
| IT1048758B (it) | 1980-12-20 |