ES399297A1 - Tone ringer circuits - Google Patents
Tone ringer circuitsInfo
- Publication number
- ES399297A1 ES399297A1 ES399297A ES399297A ES399297A1 ES 399297 A1 ES399297 A1 ES 399297A1 ES 399297 A ES399297 A ES 399297A ES 399297 A ES399297 A ES 399297A ES 399297 A1 ES399297 A1 ES 399297A1
- Authority
- ES
- Spain
- Prior art keywords
- input terminals
- generator
- signal
- oscillating
- oscillating generator
- 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
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
Abstract
Acoustic frequency calling apparatus circuit, comprising input terminals, an oscillating generator, an electroacoustic transducer operable by the generator in response to a valid signal applied to the input terminals, and a discriminator assembly interconnected with the input terminals and the oscillating generator to control the oscillating generator, the discriminator assembly being adapted to determine the validity of the applied input signal by producing predetermined responses based on predetermined characteristics of the frequency, voltage and energy content of the signal. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10732971A | 1971-01-18 | 1971-01-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES399297A1 true ES399297A1 (en) | 1975-05-01 |
Family
ID=22316077
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES399297A Expired ES399297A1 (en) | 1971-01-18 | 1972-01-15 | Tone ringer circuits |
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 |
FR2122468B1 (en) | 1975-08-29 |
JPS5738065B1 (en) | 1982-08-13 |
CA952634A (en) | 1974-08-06 |
DE2201764B2 (en) | 1980-12-18 |
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