ES460892A1 - Un circuito para controlar el paso de corriente por las li- neas de abonado de una central automatica de telecomunica- cion. - Google Patents
Un circuito para controlar el paso de corriente por las li- neas de abonado de una central automatica de telecomunica- cion.Info
- Publication number
- ES460892A1 ES460892A1 ES460892A ES460892A ES460892A1 ES 460892 A1 ES460892 A1 ES 460892A1 ES 460892 A ES460892 A ES 460892A ES 460892 A ES460892 A ES 460892A ES 460892 A1 ES460892 A1 ES 460892A1
- Authority
- ES
- Spain
- Prior art keywords
- line
- line current
- detector
- current detector
- output
- 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
- 230000003287 optical effect Effects 0.000 abstract 2
- 239000004973 liquid crystal related substance Substances 0.000 abstract 1
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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
- Liquid Crystal (AREA)
- Interface Circuits In Exchanges (AREA)
- Networks Using Active Elements (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
Un circuito para controlar el paso de corriente por las líneas de abonado de una central automática de telecomunicación, que incluye una o más fuentes luminosas asignadas a las líneas, cierto número de dispositivos ópticos cada uno de los cuales está asignado a una línea y cada uno de ellos pudiendo alterar su impedancia dependiendo de la luz que incida sobre dicho dispositivo óptico, conexiones desde cada una de las líneas a su dispositivo óptico pudiendo alterarse la transmisividad luminosa de ellas de acuerdo con las condiciones de la corriente eléctrica de esa línea, un detector asociado con cada dispositivo óptico de tal manera que los cambios de corriente en la línea del abonado se detectan por dichos detectores como resultado de la luz que los llega a través del dispositivo óptico de la línea, y conexiones de salida asociadas respectivamente con dichos detectores.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB30136/76A GB1532508A (en) | 1976-07-20 | 1976-07-20 | Telecommunication systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES460892A1 true ES460892A1 (es) | 1978-04-16 |
Family
ID=10302889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES460892A Expired ES460892A1 (es) | 1976-07-20 | 1977-07-20 | Un circuito para controlar el paso de corriente por las li- neas de abonado de una central automatica de telecomunica- cion. |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US4158170A (es) |
| JP (1) | JPS5312205A (es) |
| AR (1) | AR216478A1 (es) |
| AU (1) | AU510624B2 (es) |
| BE (1) | BE856960A (es) |
| BR (1) | BR7704631A (es) |
| CA (1) | CA1090497A (es) |
| CH (1) | CH622394A5 (es) |
| DE (1) | DE2724013C2 (es) |
| ES (1) | ES460892A1 (es) |
| FR (1) | FR2359551A1 (es) |
| GB (1) | GB1532508A (es) |
| NL (1) | NL7707886A (es) |
| NO (1) | NO772465L (es) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5683089U (es) * | 1979-11-27 | 1981-07-04 | ||
| JPS58148229A (ja) * | 1982-02-27 | 1983-09-03 | Hino Motors Ltd | 直噴式デイ−ゼルエンジンの吸気装置 |
| DE3214624C2 (de) * | 1982-04-20 | 1986-05-28 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zur Auswertung von Teilnehmerschleifenzuständen in Fernsprechanlagen, insbesondere in Fernsprechnebenstellenanlagen |
| AU3967999A (en) | 1998-05-02 | 1999-11-23 | Focal, Inc. | Light source power tester |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3346811A (en) * | 1964-02-24 | 1967-10-10 | Allis Chalmers Mfg Co | Means for sensing conditions in high potential region and for transmitting such intelligence by light means to low potential regions |
| GB1121423A (en) * | 1967-01-02 | 1968-07-24 | Mullard Ltd | Magneto-optical current-measuring apparatus and method |
| GB1219268A (en) * | 1968-01-26 | 1971-01-13 | Mullard Ltd | Electric current measurer |
| FR2041009A1 (es) * | 1969-04-25 | 1971-01-29 | Walter Transformateurs | |
| DE1955403C3 (de) * | 1969-10-30 | 1974-04-25 | Siemens Ag, 1000 Berlin U. 8000 Muenchen | Digitale Meßeinrichtung für Ströme in Hochspannungsleitern |
| JPS4984508A (es) * | 1972-12-19 | 1974-08-14 | ||
| JPS50102343A (es) * | 1974-01-10 | 1975-08-13 | ||
| US3941939A (en) * | 1974-11-25 | 1976-03-02 | International Telephone And Telegraph Corporation | Electronic ring trip circuit |
| US3991367A (en) * | 1976-01-20 | 1976-11-09 | The United States Of America As Represented By The Secretary Of The Interior | Detection of potential on high-voltage transmission lines |
| US4032843A (en) * | 1976-06-21 | 1977-06-28 | International Telephone And Telegraph Corporation | Compensated signal isolator |
-
1976
- 1976-07-20 GB GB30136/76A patent/GB1532508A/en not_active Expired
-
1977
- 1977-05-27 DE DE2724013A patent/DE2724013C2/de not_active Expired
- 1977-07-11 US US05/814,608 patent/US4158170A/en not_active Expired - Lifetime
- 1977-07-12 NO NO772465A patent/NO772465L/no unknown
- 1977-07-13 CA CA282,638A patent/CA1090497A/en not_active Expired
- 1977-07-14 BR BR7704631A patent/BR7704631A/pt unknown
- 1977-07-15 NL NL7707886A patent/NL7707886A/xx not_active Application Discontinuation
- 1977-07-15 AU AU27069/77A patent/AU510624B2/en not_active Expired
- 1977-07-18 FR FR7721930A patent/FR2359551A1/fr not_active Withdrawn
- 1977-07-19 AR AR268475A patent/AR216478A1/es active
- 1977-07-20 CH CH897777A patent/CH622394A5/de not_active IP Right Cessation
- 1977-07-20 BE BE2056093A patent/BE856960A/xx unknown
- 1977-07-20 JP JP8615177A patent/JPS5312205A/ja active Granted
- 1977-07-20 ES ES460892A patent/ES460892A1/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2724013A1 (de) | 1978-02-02 |
| AU510624B2 (en) | 1980-07-03 |
| BR7704631A (pt) | 1978-04-04 |
| AR216478A1 (es) | 1979-12-28 |
| CA1090497A (en) | 1980-11-25 |
| JPS5633917B2 (es) | 1981-08-06 |
| NO772465L (no) | 1978-01-23 |
| BE856960A (nl) | 1978-01-20 |
| US4158170A (en) | 1979-06-12 |
| CH622394A5 (es) | 1981-03-31 |
| DE2724013C2 (de) | 1984-02-23 |
| NL7707886A (nl) | 1978-01-24 |
| JPS5312205A (en) | 1978-02-03 |
| GB1532508A (en) | 1978-11-15 |
| AU2706977A (en) | 1979-01-18 |
| FR2359551A1 (fr) | 1978-02-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FD1A | Patent lapsed |
Effective date: 19990201 |