ES8705729A1 - Un sistema de acoplamiento punta-llamada para telefonia - Google Patents
Un sistema de acoplamiento punta-llamada para telefoniaInfo
- Publication number
- ES8705729A1 ES8705729A1 ES548266A ES548266A ES8705729A1 ES 8705729 A1 ES8705729 A1 ES 8705729A1 ES 548266 A ES548266 A ES 548266A ES 548266 A ES548266 A ES 548266A ES 8705729 A1 ES8705729 A1 ES 8705729A1
- Authority
- ES
- Spain
- Prior art keywords
- loop current
- detection
- reverse
- pabx
- ringing
- 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
- 238000001514 detection method Methods 0.000 abstract 4
- 238000002955 isolation Methods 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/0096—Trunk circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
- Telephonic Communication Services (AREA)
- Devices For Supply Of Signal Current (AREA)
- Push-Button Switches (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
SISTEMA DE ACOPLAMIENTO PUNTA-LLAMADA PARA TELEFONIA. COMPRENDE: UN CIRCUITO (10) DE LINEA PABX O DE CENTRAL QUE INCLUYE LINEAS DE PUNTA Y DE LLAMADA (12, 14); UN TRANSFORMADOR (16) DE AISLAMIENTO QUE PROPORCIONA AISLAMIENTO DE SEÑALES EN MODO COMUN EN EL BUCLE LOCAL; UN CIRCUITO DE EQUILIBRIO Y UN FILTRO CODIFICADOR-DECODIFICADOR (18, 20); UN RELE (24) QUE CONTROLA LA INTERCONEXION DE LAS LINEAS DE PUNTA Y DE LLAMADA (12, 14) CON EL PERCEPTOR (22), CUYA SALIDA ES DIRIGIDA A UN CIRCUITO DE RECONOCIMIENTO DE IMPULSOS QUE ANALIZA LA SEÑAL DE SALIDA DEL DETECTOR PARA DETERMINAR SI HAY PRESENTA EN EL CIRCUITO (10) UNA SEÑAL DE LLAMADA. TIENE APLICACION EN SISTEMAS TELEFONICOS.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/665,681 US4731827A (en) | 1984-10-29 | 1984-10-29 | Interswitch line circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
ES8705729A1 true ES8705729A1 (es) | 1987-05-01 |
ES548266A0 ES548266A0 (es) | 1987-05-01 |
Family
ID=24671124
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES548266A Expired ES8705729A1 (es) | 1984-10-29 | 1985-10-28 | Un sistema de acoplamiento punta-llamada para telefonia |
Country Status (12)
Country | Link |
---|---|
US (1) | US4731827A (es) |
EP (1) | EP0203938A1 (es) |
JP (1) | JPS61107895A (es) |
KR (1) | KR880700575A (es) |
CN (1) | CN85109222A (es) |
AU (1) | AU4968185A (es) |
BR (1) | BR8507016A (es) |
CA (1) | CA1244166A (es) |
ES (1) | ES8705729A1 (es) |
IL (1) | IL76836A (es) |
WO (1) | WO1986002795A1 (es) |
ZA (1) | ZA858252B (es) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0242571B1 (de) * | 1986-04-23 | 1992-08-19 | Siemens Aktiengesellschaft | Schaltungsanordnung für den Anschluss von Anschlussleitungen eines digitalen Zeitmultiplex-Fernsprechnetzes |
US5101401A (en) * | 1989-11-29 | 1992-03-31 | Nec Corporation | Polarity judging arrangement by using frame synchronization signals of a received signal |
US5694465A (en) * | 1995-03-16 | 1997-12-02 | Advanced Micro Devices, Inc. | Integrated ringer for short telephone lines |
KR100233097B1 (ko) | 1996-10-09 | 1999-12-01 | 윤종용 | 전화라인 인터페이스 회로의 링신호 및 훅크스위치의 상태 검출회로 |
US5982878A (en) * | 1997-05-15 | 1999-11-09 | Hubbell Incorporated | Combined loop current sink, battery detector, and ringing detector circuit |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3408581A (en) * | 1965-08-26 | 1968-10-29 | North American Rockwell | Digital suppressed carrier demodulator |
US3622895A (en) * | 1970-02-26 | 1971-11-23 | Gte Sylvania Inc | Universal digital line receiver employing frequency conversion to achieve isolation |
DE2613590C2 (de) * | 1976-03-30 | 1977-10-27 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zur Auswertung von Zustandsänderung auf Leitungen in Fernmelde- insbesondere Fernsprechanlagen |
IL57011A (en) * | 1979-04-05 | 1982-05-31 | Tadiran Israel Elect Ind Ltd | Multi purpose current detector for pabx |
US4278938A (en) * | 1979-07-27 | 1981-07-14 | Bell Telephone Laboratories, Incorporated | Electromagnetic arrangement for measuring electrical current |
JPS5637793A (en) * | 1979-09-05 | 1981-04-11 | Hitachi Ltd | Loop detecting circuit |
US4323734A (en) * | 1980-05-15 | 1982-04-06 | Crest Industries, Inc. | Interface circuit for telephone line to equipment signal coupling |
US4361732A (en) * | 1981-02-09 | 1982-11-30 | Northern Telecom Limited | Trunk interface circuit with current compensation |
US4495494A (en) * | 1981-10-05 | 1985-01-22 | Bell Telephone Laboratories, Incorporated | Detector circuit for communication lines |
US4454477A (en) * | 1982-04-28 | 1984-06-12 | At&T Bell Laboratories | Loop current detector with threshold setting impedance |
US4524246A (en) * | 1982-07-07 | 1985-06-18 | Harris Corporation | SLIC II--common-mode current rejection |
US4446338A (en) * | 1982-07-12 | 1984-05-01 | Northern Telecom Limited | Telephone lines status sensor |
FR2531296B1 (fr) * | 1982-07-30 | 1988-04-15 | Cit Alcatel | Procede et dispositif de detection de boucle en phase sonnerie |
US4580011A (en) * | 1983-09-30 | 1986-04-01 | Glaser Robert E | Distributed processing telephone switching system |
US4570034A (en) * | 1984-06-18 | 1986-02-11 | Novation, Inc. | Phone line ring signal detection circuit |
-
1984
- 1984-10-29 US US06/665,681 patent/US4731827A/en not_active Expired - Lifetime
-
1985
- 1985-10-11 AU AU49681/85A patent/AU4968185A/en not_active Withdrawn
- 1985-10-11 WO PCT/US1985/002012 patent/WO1986002795A1/en not_active Application Discontinuation
- 1985-10-11 EP EP85905294A patent/EP0203938A1/en not_active Withdrawn
- 1985-10-11 BR BR8507016A patent/BR8507016A/pt unknown
- 1985-10-11 KR KR1019860700413A patent/KR880700575A/ko not_active Application Discontinuation
- 1985-10-28 CN CN198585109222A patent/CN85109222A/zh active Pending
- 1985-10-28 JP JP60242571A patent/JPS61107895A/ja active Pending
- 1985-10-28 ZA ZA858252A patent/ZA858252B/xx unknown
- 1985-10-28 IL IL76836A patent/IL76836A/xx unknown
- 1985-10-28 ES ES548266A patent/ES8705729A1/es not_active Expired
- 1985-10-28 CA CA000494040A patent/CA1244166A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
IL76836A (en) | 1990-04-29 |
ZA858252B (en) | 1986-06-25 |
EP0203938A1 (en) | 1986-12-10 |
IL76836A0 (en) | 1986-02-28 |
JPS61107895A (ja) | 1986-05-26 |
KR880700575A (ko) | 1988-03-15 |
WO1986002795A1 (en) | 1986-05-09 |
BR8507016A (pt) | 1987-01-06 |
CA1244166A (en) | 1988-11-01 |
ES548266A0 (es) | 1987-05-01 |
AU4968185A (en) | 1986-05-15 |
US4731827A (en) | 1988-03-15 |
CN85109222A (zh) | 1986-09-17 |
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