CH570086A5 - - Google Patents
Info
- Publication number
- CH570086A5 CH570086A5 CH1671572A CH1671572A CH570086A5 CH 570086 A5 CH570086 A5 CH 570086A5 CH 1671572 A CH1671572 A CH 1671572A CH 1671572 A CH1671572 A CH 1671572A CH 570086 A5 CH570086 A5 CH 570086A5
- Authority
- CH
- Switzerland
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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7141072A FR2161191A5 (it) | 1971-11-17 | 1971-11-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH570086A5 true CH570086A5 (it) | 1975-11-28 |
Family
ID=9085882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH1671572A CH570086A5 (it) | 1971-11-17 | 1972-11-16 |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US3865992A (it) |
| AR (1) | AR195397A1 (it) |
| BE (1) | BE791415A (it) |
| BR (1) | BR7208047D0 (it) |
| CA (1) | CA1001786A (it) |
| CH (1) | CH570086A5 (it) |
| DE (1) | DE2255752B2 (it) |
| ES (1) | ES408651A1 (it) |
| FR (1) | FR2161191A5 (it) |
| GB (1) | GB1386138A (it) |
| IT (1) | IT970460B (it) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7301486A (it) * | 1973-02-01 | 1974-08-05 | ||
| US3941939A (en) * | 1974-11-25 | 1976-03-02 | International Telephone And Telegraph Corporation | Electronic ring trip circuit |
| FR2296324A1 (fr) * | 1974-12-27 | 1976-07-23 | Ericsson Telefon Ab L M | Dispositif d'appel perfectionne pour installations de telephonie |
| GB1529452A (en) * | 1975-04-10 | 1978-10-18 | Ansafone Ltd | Detection of direct currents or voltages |
| JPS5356906A (en) * | 1976-11-02 | 1978-05-23 | Nec Corp | Ring trip circuit |
| JPS5369504A (en) * | 1976-12-02 | 1978-06-21 | Fujitsu Ltd | Ring trip circuit |
| JPS56119360U (it) * | 1981-01-21 | 1981-09-11 | ||
| US4447675A (en) * | 1982-10-29 | 1984-05-08 | Bell Telephone Laboratories, Incorporated | Ring-trip detector |
| JP3700918B2 (ja) * | 1999-06-14 | 2005-09-28 | 日本電気株式会社 | 加入者回路 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3341665A (en) * | 1964-03-23 | 1967-09-12 | Lorain Prod Corp | Interrupter circuit for telephone systems |
| US3469036A (en) * | 1966-08-31 | 1969-09-23 | Robosonics Inc | Telephone ringing signal detection means |
| US3746798A (en) * | 1972-05-23 | 1973-07-17 | Gte Automatic Electric Lab Inc | Electronic ring trip circuit |
-
0
- BE BE791415D patent/BE791415A/xx unknown
-
1971
- 1971-11-17 FR FR7141072A patent/FR2161191A5/fr not_active Expired
-
1972
- 1972-11-06 GB GB5103072A patent/GB1386138A/en not_active Expired
- 1972-11-14 DE DE2255752A patent/DE2255752B2/de not_active Withdrawn
- 1972-11-14 IT IT31613/72A patent/IT970460B/it active
- 1972-11-15 US US306594A patent/US3865992A/en not_active Expired - Lifetime
- 1972-11-16 BR BR8047/72A patent/BR7208047D0/pt unknown
- 1972-11-16 ES ES408651A patent/ES408651A1/es not_active Expired
- 1972-11-16 CA CA156,654A patent/CA1001786A/en not_active Expired
- 1972-11-16 CH CH1671572A patent/CH570086A5/xx not_active IP Right Cessation
- 1972-11-20 AR AR245214A patent/AR195397A1/es active
Also Published As
| Publication number | Publication date |
|---|---|
| AR195397A1 (es) | 1973-10-08 |
| GB1386138A (en) | 1975-03-05 |
| CA1001786A (en) | 1976-12-14 |
| FR2161191A5 (it) | 1973-07-06 |
| DE2255752A1 (de) | 1973-05-24 |
| DE2255752B2 (de) | 1981-02-12 |
| BR7208047D0 (pt) | 1973-09-13 |
| IT970460B (it) | 1974-04-10 |
| ES408651A1 (es) | 1975-11-01 |
| BE791415A (fr) | 1973-05-16 |
| US3865992A (en) | 1975-02-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |