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MXPA03011374A - Dispositivo para detectar la toma de una linea telefonica. - Google Patents

Dispositivo para detectar la toma de una linea telefonica.

Info

Publication number
MXPA03011374A
MXPA03011374A MXPA03011374A MXPA03011374A MXPA03011374A MX PA03011374 A MXPA03011374 A MX PA03011374A MX PA03011374 A MXPA03011374 A MX PA03011374A MX PA03011374 A MXPA03011374 A MX PA03011374A MX PA03011374 A MXPA03011374 A MX PA03011374A
Authority
MX
Mexico
Prior art keywords
telephone line
optocoupler
measurement
line seizure
detecting telephone
Prior art date
Application number
MXPA03011374A
Other languages
English (en)
Inventor
Le Garrec Thomas
Original Assignee
Thomson Licensing Sa
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Thomson Licensing Sa filed Critical Thomson Licensing Sa
Publication of MXPA03011374A publication Critical patent/MXPA03011374A/es

Links

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
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/82—Line monitoring circuits for call progress or status discrimination

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Telephonic Communication Services (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

La invencion se refiere a un dispositivo para detectar la toma de una linea telefonica que realiza una medicion del voltaje (UL) de la linea telefonica a traves de un primer y un segundo acoplador (OC1, OC2) optico conectados en serie con la linea telefonica y dispuestos en fila en sentido contrario. El primer acoplador (OC1) optico permite una descarga de un condensador (C) conectado a la linea telefonica, el segundo acoplador (OC2) optico convierte la corriente (ID) de descarga en una imagen (ID¦) de corriente en un circuito (S) de medicion. Este dispositivo comprende los medios para generar una retroalimentacion negativa del segundo acoplador (OC2) optico hacia el primer acopiador (OC1) optico. Con este diseno, el efecto del coeficiente de transferencia de los acopladores opticos en la medicion del voltaje se disminuye con el resultado de aumentar la precision de la medicion.
MXPA03011374A 2001-06-14 2002-06-05 Dispositivo para detectar la toma de una linea telefonica. MXPA03011374A (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0108083A FR2826217B1 (fr) 2001-06-14 2001-06-14 Dispositif de detection de prise de ligne telephonique
PCT/EP2002/006160 WO2002103989A1 (en) 2001-06-14 2002-06-05 Device for detecting telephone line seizure

Publications (1)

Publication Number Publication Date
MXPA03011374A true MXPA03011374A (es) 2004-04-05

Family

ID=8864536

Family Applications (1)

Application Number Title Priority Date Filing Date
MXPA03011374A MXPA03011374A (es) 2001-06-14 2002-06-05 Dispositivo para detectar la toma de una linea telefonica.

Country Status (10)

Country Link
US (1) US6876741B2 (es)
EP (1) EP1397902B1 (es)
JP (1) JP4280628B2 (es)
KR (1) KR100912556B1 (es)
CN (1) CN1276639C (es)
DE (1) DE60221831T2 (es)
ES (1) ES2290295T3 (es)
FR (1) FR2826217B1 (es)
MX (1) MXPA03011374A (es)
WO (1) WO2002103989A1 (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005072292A2 (en) * 2004-01-24 2005-08-11 Hugh Mctavish Methods for enhancing radiation therapy
WO2007030945A1 (en) * 2005-09-15 2007-03-22 Tyco Safety Products Canada Ltd. Telephone line communication interface
US7835516B2 (en) 2005-12-29 2010-11-16 Tyco Safety Products Canada Ltd. Direct access arrangement device
JP5491304B2 (ja) * 2010-07-08 2014-05-14 株式会社アドバンテスト スイッチ回路および試験装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3712324C1 (en) * 1987-04-11 1988-08-25 Zettler Elektrotechn Alois Monitoring circuit for an ancillary telephone device
US5291545A (en) * 1990-10-02 1994-03-01 Intertex Data Ab Apparatus and method for determining the state of a telephone line
US6134321A (en) * 1995-12-22 2000-10-17 Thomas Licensing S.A. Modem loop current detect system to detect an off-hook condition in an extension telephone
US6470083B1 (en) * 1997-12-24 2002-10-22 Abb Automation Inc. Telecommunications off-hook and intrusion detection method and apparatus
US6393123B1 (en) * 2000-04-12 2002-05-21 General Electric Company Method and modem circuit for determining connection status of a phone line

Also Published As

Publication number Publication date
JP4280628B2 (ja) 2009-06-17
ES2290295T3 (es) 2008-02-16
KR20040010676A (ko) 2004-01-31
DE60221831T2 (de) 2008-05-15
EP1397902B1 (en) 2007-08-15
WO2002103989A1 (en) 2002-12-27
JP2004531158A (ja) 2004-10-07
FR2826217B1 (fr) 2003-12-12
CN1513254A (zh) 2004-07-14
CN1276639C (zh) 2006-09-20
US6876741B2 (en) 2005-04-05
FR2826217A1 (fr) 2002-12-20
US20040151301A1 (en) 2004-08-05
KR100912556B1 (ko) 2009-08-19
EP1397902A1 (en) 2004-03-17
DE60221831D1 (de) 2007-09-27

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Legal Events

Date Code Title Description
FG Grant or registration