ES476875A1 - Ringing circuit for centrally controlled telephone exchange junction - has alternating signal source, and bipolar electronic switch output connected to subscriber and timer - Google Patents
Ringing circuit for centrally controlled telephone exchange junction - has alternating signal source, and bipolar electronic switch output connected to subscriber and timerInfo
- Publication number
- ES476875A1 ES476875A1 ES476875A ES476875A ES476875A1 ES 476875 A1 ES476875 A1 ES 476875A1 ES 476875 A ES476875 A ES 476875A ES 476875 A ES476875 A ES 476875A ES 476875 A1 ES476875 A1 ES 476875A1
- Authority
- ES
- Spain
- Prior art keywords
- signal source
- alternating signal
- ringing circuit
- electronic switch
- subscriber
- 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
- H04M19/026—Arrangements for interrupting the ringing current
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Abstract
The ringing circuit is designed to present to a called subscriber a continuous call tone followed by a discontinuous call tone. The ringing circuit has an alternating signal source and a first bipolar electronic switch fitted with two input terminals. The input terminals are supplied from the alternating signal source. Its two output terminals are connected to the called subscribers line and to a control terminal fed by a timing signal generator. The signal generator is controlled by the central control unit.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7801170A FR2423096A1 (en) | 1978-01-17 | 1978-01-17 | Ringing circuit for centrally controlled telephone exchange junction - has alternating signal source, and bipolar electronic switch output connected to subscriber and timer |
Publications (1)
Publication Number | Publication Date |
---|---|
ES476875A1 true ES476875A1 (en) | 1979-05-16 |
Family
ID=9203528
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES476875A Expired ES476875A1 (en) | 1978-01-17 | 1979-01-16 | Ringing circuit for centrally controlled telephone exchange junction - has alternating signal source, and bipolar electronic switch output connected to subscriber and timer |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE873499A (en) |
DE (1) | DE2901739A1 (en) |
ES (1) | ES476875A1 (en) |
FR (1) | FR2423096A1 (en) |
IT (1) | IT1111760B (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
YU39444B (en) * | 1979-09-07 | 1984-12-31 | Iskra Sozd Elektro Indus | Subschribes circuit for domestic electronic telephone exchangers |
IT1128374B (en) * | 1980-02-19 | 1986-05-28 | Cselt Centro Studi Lab Telecom | TELEPHONE CIRCUIT FOR THE GENERATION OF THE RINGTONE RHYTHM AND THE DETECTION OF THE RELEASE |
US4349703A (en) * | 1980-03-31 | 1982-09-14 | International Telephone And Telegraph Corporation | Programmable ring signal generator |
DE3036686C2 (en) * | 1980-09-29 | 1983-12-01 | Siemens AG, 1000 Berlin und 8000 München | Subscriber line circuit |
DE3141375A1 (en) * | 1981-10-17 | 1983-06-30 | Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg | METHOD AND CIRCUIT ARRANGEMENT FOR DETECTING LOOP CURRENT CRITERIA IN A TELECOMMUNICATION SYSTEM |
-
1978
- 1978-01-17 FR FR7801170A patent/FR2423096A1/en active Granted
-
1979
- 1979-01-15 IT IT19275/79A patent/IT1111760B/en active
- 1979-01-16 ES ES476875A patent/ES476875A1/en not_active Expired
- 1979-01-16 BE BE192979A patent/BE873499A/en unknown
- 1979-01-17 DE DE19792901739 patent/DE2901739A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
IT1111760B (en) | 1986-01-13 |
DE2901739A1 (en) | 1979-07-19 |
BE873499A (en) | 1979-05-16 |
FR2423096B1 (en) | 1981-10-16 |
FR2423096A1 (en) | 1979-11-09 |
IT7919275A0 (en) | 1979-01-15 |
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