FR2122468B1 - - Google Patents
Info
- Publication number
- FR2122468B1 FR2122468B1 FR7201428A FR7201428A FR2122468B1 FR 2122468 B1 FR2122468 B1 FR 2122468B1 FR 7201428 A FR7201428 A FR 7201428A FR 7201428 A FR7201428 A FR 7201428A FR 2122468 B1 FR2122468 B1 FR 2122468B1
- Authority
- FR
- France
- 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
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10732971A | 1971-01-18 | 1971-01-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2122468A1 FR2122468A1 (en) | 1972-09-01 |
| FR2122468B1 true FR2122468B1 (en) | 1975-08-29 |
Family
ID=22316077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7201428A Expired FR2122468B1 (en) | 1971-01-18 | 1972-01-17 |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5738065B1 (en) |
| BE (1) | BE778121A (en) |
| CA (3) | CA952634A (en) |
| CH (1) | CH544473A (en) |
| DE (1) | DE2201764C3 (en) |
| ES (1) | ES399297A1 (en) |
| FR (1) | FR2122468B1 (en) |
| GB (1) | GB1372754A (en) |
| IT (1) | IT948859B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5076707U (en) * | 1973-11-14 | 1975-07-03 | ||
| JPS5180105A (en) * | 1975-01-09 | 1976-07-13 | Nakayo Telecommunications | |
| JPS526005A (en) * | 1975-07-04 | 1977-01-18 | Oki Electric Ind Co Ltd | Tone ringer receiving system |
| CH619332A5 (en) * | 1976-02-02 | 1980-09-15 | Intertel Ii Inc | Signal-controlled system for optional blocking or unblocking of a transmission line, and use of the system |
| JPS5547019A (en) * | 1978-09-27 | 1980-04-02 | Sanden Corp | Sound insulation device for electromagnetic clutch |
| WO1981000657A1 (en) * | 1979-08-20 | 1981-03-05 | Western Electric Co | Electronic tone ringer |
| GB2121648B (en) * | 1982-05-24 | 1986-12-03 | Tad Avanti | Ring detector and telephone line monitoring system for telephone answering unit |
| JPS6216669U (en) * | 1985-07-12 | 1987-01-31 | ||
| DE3535868C1 (en) * | 1985-10-08 | 1987-05-21 | Texas Instruments Deutschland | Call signal recognition circuitry for telephone subscriber's appts. - has current sensor between rectifier and diode supplying detector sensing frequency |
| DE4212858A1 (en) * | 1992-04-16 | 1993-10-21 | Siemens Ag | Ringer |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2951910A (en) * | 1958-01-14 | 1960-09-06 | North Electric Co | Substation signalling device |
| US3210479A (en) * | 1962-08-30 | 1965-10-05 | Automatic Elect Lab | Voice-frequency selective signalling arrangement |
| FR1444467A (en) * | 1964-08-25 | 1966-07-01 | Sits Soc It Telecom Siemens | Set of components forming a variable note ringtone, especially for subscriber telephone set |
| US3508012A (en) * | 1967-11-24 | 1970-04-21 | Bell Telephone Labor Inc | Compatible tone ringer |
-
1971
- 1971-09-01 CA CA121,898A patent/CA952634A/en not_active Expired
-
1972
- 1972-01-13 IT IT67107/72A patent/IT948859B/en active
- 1972-01-14 DE DE2201764A patent/DE2201764C3/en not_active Expired
- 1972-01-15 ES ES399297A patent/ES399297A1/en not_active Expired
- 1972-01-17 BE BE778121A patent/BE778121A/en not_active IP Right Cessation
- 1972-01-17 FR FR7201428A patent/FR2122468B1/fr not_active Expired
- 1972-01-18 CH CH70972A patent/CH544473A/en not_active IP Right Cessation
- 1972-01-18 GB GB230372A patent/GB1372754A/en not_active Expired
- 1972-01-18 JP JP672472A patent/JPS5738065B1/ja active Pending
-
1973
- 1973-05-28 CA CA172438A patent/CA939090A/en not_active Expired
- 1973-05-28 CA CA172437A patent/CA939089A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CA939090A (en) | 1973-12-25 |
| GB1372754A (en) | 1974-11-06 |
| CA939089A (en) | 1973-12-25 |
| BE778121A (en) | 1972-05-16 |
| DE2201764C3 (en) | 1981-10-08 |
| IT948859B (en) | 1973-06-11 |
| FR2122468A1 (en) | 1972-09-01 |
| CH544473A (en) | 1973-11-15 |
| DE2201764A1 (en) | 1972-08-03 |
| JPS4715005A (en) | 1972-08-17 |
| JPS5738065B1 (en) | 1982-08-13 |
| ES399297A1 (en) | 1975-05-01 |
| CA952634A (en) | 1974-08-06 |
| DE2201764B2 (en) | 1980-12-18 |