IT948859B - Suoneria a segnale musicale per apparecchi telefonici - Google Patents
Suoneria a segnale musicale per apparecchi telefoniciInfo
- Publication number
- IT948859B IT948859B IT67107/72A IT6710772A IT948859B IT 948859 B IT948859 B IT 948859B IT 67107/72 A IT67107/72 A IT 67107/72A IT 6710772 A IT6710772 A IT 6710772A IT 948859 B IT948859 B IT 948859B
- Authority
- IT
- Italy
- Prior art keywords
- rington
- telephone devices
- musical signal
- musical
- signal
- Prior art date
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 (1)
Publication Number | Publication Date |
---|---|
IT948859B true IT948859B (it) | 1973-06-11 |
Family
ID=22316077
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT67107/72A IT948859B (it) | 1971-01-18 | 1972-01-13 | Suoneria a segnale musicale per apparecchi telefonici |
Country Status (9)
Country | Link |
---|---|
JP (1) | JPS5738065B1 (it) |
BE (1) | BE778121A (it) |
CA (3) | CA952634A (it) |
CH (1) | CH544473A (it) |
DE (1) | DE2201764C3 (it) |
ES (1) | ES399297A1 (it) |
FR (1) | FR2122468B1 (it) |
GB (1) | GB1372754A (it) |
IT (1) | IT948859B (it) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5076707U (it) * | 1973-11-14 | 1975-07-03 | ||
JPS5180105A (it) * | 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 |
GB2071963B (en) * | 1979-08-20 | 1983-07-27 | Western Electric Co | Electronic toner ringer |
GB2121648B (en) * | 1982-05-24 | 1986-12-03 | Tad Avanti | Ring detector and telephone line monitoring system for telephone answering unit |
JPS6216669U (it) * | 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 (de) * | 1992-04-16 | 1993-10-21 | Siemens Ag | Tonrufschaltung |
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 (fr) * | 1964-08-25 | 1966-07-01 | Sits Soc It Telecom Siemens | Ensemble d'organes formant une sonnerie à note variable, spécialement pour poste téléphonique d'abonné |
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/it active
- 1972-01-14 DE DE2201764A patent/DE2201764C3/de not_active Expired
- 1972-01-15 ES ES399297A patent/ES399297A1/es not_active Expired
- 1972-01-17 BE BE778121A patent/BE778121A/xx not_active IP Right Cessation
- 1972-01-17 FR FR7201428A patent/FR2122468B1/fr not_active Expired
- 1972-01-18 CH CH70972A patent/CH544473A/de 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 |
---|---|
BE778121A (fr) | 1972-05-16 |
FR2122468B1 (it) | 1975-08-29 |
CA939089A (en) | 1973-12-25 |
DE2201764A1 (de) | 1972-08-03 |
DE2201764B2 (de) | 1980-12-18 |
JPS4715005A (it) | 1972-08-17 |
CH544473A (de) | 1973-11-15 |
CA952634A (en) | 1974-08-06 |
GB1372754A (en) | 1974-11-06 |
JPS5738065B1 (it) | 1982-08-13 |
CA939090A (en) | 1973-12-25 |
ES399297A1 (es) | 1975-05-01 |
FR2122468A1 (it) | 1972-09-01 |
DE2201764C3 (de) | 1981-10-08 |
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