FR2334251A1 - Generateur de courant de sonnerie pour systeme telephonique a courant porteur - Google Patents
Generateur de courant de sonnerie pour systeme telephonique a courant porteurInfo
- Publication number
- FR2334251A1 FR2334251A1 FR7636087A FR7636087A FR2334251A1 FR 2334251 A1 FR2334251 A1 FR 2334251A1 FR 7636087 A FR7636087 A FR 7636087A FR 7636087 A FR7636087 A FR 7636087A FR 2334251 A1 FR2334251 A1 FR 2334251A1
- Authority
- FR
- France
- Prior art keywords
- telephone systems
- ringing
- carrier
- current
- current 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.)
- Withdrawn
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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Mobile Radio Communication Systems (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/638,151 US4015091A (en) | 1975-12-05 | 1975-12-05 | Telephone ringing generators |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2334251A1 true FR2334251A1 (fr) | 1977-07-01 |
Family
ID=24558846
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7636087A Withdrawn FR2334251A1 (fr) | 1975-12-05 | 1976-11-30 | Generateur de courant de sonnerie pour systeme telephonique a courant porteur |
Country Status (10)
Country | Link |
---|---|
US (1) | US4015091A (fr) |
JP (1) | JPS5269510A (fr) |
AU (1) | AU2009776A (fr) |
BE (1) | BE849000A (fr) |
CA (1) | CA1063741A (fr) |
DE (1) | DE2655156A1 (fr) |
ES (1) | ES453912A1 (fr) |
FR (1) | FR2334251A1 (fr) |
IT (1) | IT1064831B (fr) |
SE (1) | SE7613129L (fr) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4156150A (en) * | 1977-12-16 | 1979-05-22 | Bell Telephone Laboratories, Incorporated | Circuit for regulating a DC voltage on which a large AC voltage is superimposed |
US4239935A (en) * | 1979-04-27 | 1980-12-16 | Bell Telephone Laboratories, Incorporated | Ringing generator |
US4415961A (en) * | 1981-08-26 | 1983-11-15 | Bell Telephone Laboratories, Incorporated | Telephone ringing signal generator |
US4866587A (en) * | 1988-12-22 | 1989-09-12 | American Telephone And Telegraph Company At&T Bell Laboratories | Electronic ringing signal generator |
US5307407A (en) * | 1991-12-19 | 1994-04-26 | Nec America, Inc. | 20 Hz ring generator using high frequency PWM control |
JPH05176354A (ja) * | 1991-12-20 | 1993-07-13 | Fujitsu Ltd | 加入者インタフェース回路 |
US5420915A (en) * | 1992-11-25 | 1995-05-30 | Garrett; Timothy E. | Apparatus for instruction in use of telephone |
GB2274959B (en) * | 1993-02-08 | 1997-03-12 | Neal Ferris | Battery powered telephone visual ringing indicator |
US5838788A (en) * | 1996-10-17 | 1998-11-17 | Northern Telecom Limited | Telephone ringing signal generator |
SE507739C2 (sv) * | 1996-11-08 | 1998-07-06 | Ericsson Telefon Ab L M | Anordning vid en linjekrets för mätning av linjespänning |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3475561A (en) * | 1965-09-29 | 1969-10-28 | Superior Continental Corp | Telephone carrier system having selfcontained independently attachable line tap units |
US3471650A (en) * | 1966-02-07 | 1969-10-07 | Superior Continental Corp | Telephone signaling system for rejecting spurious ringing signals |
US3459895A (en) * | 1966-05-19 | 1969-08-05 | Itt | Centrally powered subscriber carrier systems |
US3536852A (en) * | 1969-01-23 | 1970-10-27 | Lorain Prod Corp | Telephone interruption switching circuitry |
US3780228A (en) * | 1972-03-01 | 1973-12-18 | Gte Automatic Electric Lab Inc | Automatic disconnect circuit for reducing dial pulse distortion caused by subscriber carrier equipment |
US3904833A (en) * | 1973-06-04 | 1975-09-09 | Superior Continental Corp | Ringing generator circuit with capacitor storage |
US3941941A (en) * | 1973-09-27 | 1976-03-02 | Superior Continental Corporation | Relayless switching circuit for application of ringing signals |
US3927266A (en) * | 1974-01-16 | 1975-12-16 | Gte Automatic Electric Lab Inc | Ringer power generator circuit for subscriber carrier station terminal |
JPS5342562B2 (fr) * | 1974-03-20 | 1978-11-13 | ||
US3934089A (en) * | 1974-10-31 | 1976-01-20 | Gte Automatic Electric Laboratories Incorporated | Automatic disconnect circuit for subscriber carrier telephone system |
-
1975
- 1975-12-05 US US05/638,151 patent/US4015091A/en not_active Expired - Lifetime
-
1976
- 1976-10-26 CA CA264,232A patent/CA1063741A/fr not_active Expired
- 1976-11-24 SE SE7613129A patent/SE7613129L/xx unknown
- 1976-11-30 FR FR7636087A patent/FR2334251A1/fr not_active Withdrawn
- 1976-11-30 AU AU20097/76A patent/AU2009776A/en not_active Expired
- 1976-12-02 IT IT30038/76A patent/IT1064831B/it active
- 1976-12-02 BE BE172916A patent/BE849000A/fr unknown
- 1976-12-03 ES ES453912A patent/ES453912A1/es not_active Expired
- 1976-12-03 JP JP51144855A patent/JPS5269510A/ja active Pending
- 1976-12-06 DE DE19762655156 patent/DE2655156A1/de active Pending
Also Published As
Publication number | Publication date |
---|---|
SE7613129L (sv) | 1977-06-06 |
US4015091A (en) | 1977-03-29 |
JPS5269510A (en) | 1977-06-09 |
BE849000A (fr) | 1977-04-01 |
AU2009776A (en) | 1978-06-08 |
CA1063741A (fr) | 1979-10-02 |
DE2655156A1 (de) | 1977-06-16 |
IT1064831B (it) | 1985-02-25 |
ES453912A1 (es) | 1977-11-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
BE871163A (fr) | Autocommutateur pour un systeme de telecommunication | |
FR2407624B1 (fr) | Dispositif de conference pour un systeme de telecommunications | |
BE843042A (fr) | Generateur de multitons numerique pour numerotation telephonique | |
BE866552A (fr) | Reseau de commutation pour dispositif temporel mic | |
BE858001A (fr) | Disposition de circuit pour un systeme telephonique d'interphone | |
BE849236A (fr) | Mecanisme diviseur de courant pour un systeme transporteur | |
FR2296323A1 (fr) | Systeme de communication telephonique | |
FR2305900A1 (fr) | Circuit de detection pour l'arret de sonnerie destine a un central telephonique | |
FR2334251A1 (fr) | Generateur de courant de sonnerie pour systeme telephonique a courant porteur | |
BE862521A (fr) | Circuit interface pour ligne telephonique | |
FR2319259A1 (fr) | Alimentation en courant de mise en marche pour un recepteur de television | |
FR2317832A1 (fr) | Circuit de poste telephonique | |
FR2340652A1 (fr) | Circuit de ligne pour installations telephoniques | |
BE821219A (fr) | Circuit numerique de conference pour systeme de telecommunication | |
FR2349987A1 (fr) | Circuit de protection pour circuit a courant continu | |
NO157038C (no) | En digital to-til-fire trds omformerkrets for en telefonabonnentlinje. | |
JPS5314509A (en) | Time division telephone switching system | |
AU1812976A (en) | Automatic telecommunication switching system | |
FR2334250A1 (fr) | Circuit de commande de sonnerie telephonique | |
BE867157A (fr) | Dispositif d'emission de multiplets partiels pour systemes de communications numeriques | |
JPS52105A (en) | Device for switching automatic telecommunication switching system | |
MX143883A (es) | Mejoras a un circuito receptor de llamada acustica especialmente para aparatos telefonicos | |
FR2305085A1 (fr) | Systeme de commutation telephonique | |
IL53543A (en) | D.c.ringing current arrangement for telephone substations | |
FR2331927A1 (fr) | Dispositif de telecommunication tdm mic |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |