FR2777727B1 - Modem comportant un dispositif de detection de l'occupation d'une ligne telephonique - Google Patents

Modem comportant un dispositif de detection de l'occupation d'une ligne telephonique

Info

Publication number
FR2777727B1
FR2777727B1 FR9804848A FR9804848A FR2777727B1 FR 2777727 B1 FR2777727 B1 FR 2777727B1 FR 9804848 A FR9804848 A FR 9804848A FR 9804848 A FR9804848 A FR 9804848A FR 2777727 B1 FR2777727 B1 FR 2777727B1
Authority
FR
France
Prior art keywords
occupancy
modem
detecting
telephone line
telephone
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 - Fee Related
Application number
FR9804848A
Other languages
English (en)
Other versions
FR2777727A1 (fr
Inventor
Didier Gayrard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technicolor SA
Original Assignee
Thomson Multimedia 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 Multimedia SA filed Critical Thomson Multimedia SA
Priority to FR9804848A priority Critical patent/FR2777727B1/fr
Priority to EP99400883A priority patent/EP0951170B1/fr
Priority to DE69940039T priority patent/DE69940039D1/de
Priority to US09/290,624 priority patent/US6292546B1/en
Priority to JP11106973A priority patent/JPH11331430A/ja
Priority to CN99105794.5A priority patent/CN1119011C/zh
Publication of FR2777727A1 publication Critical patent/FR2777727A1/fr
Application granted granted Critical
Publication of FR2777727B1 publication Critical patent/FR2777727B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)
  • Telephone Function (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
FR9804848A 1998-04-17 1998-04-17 Modem comportant un dispositif de detection de l'occupation d'une ligne telephonique Expired - Fee Related FR2777727B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR9804848A FR2777727B1 (fr) 1998-04-17 1998-04-17 Modem comportant un dispositif de detection de l'occupation d'une ligne telephonique
EP99400883A EP0951170B1 (fr) 1998-04-17 1999-04-12 Modem comportant un dispositif de détection de l'occupation d'une ligne téléphonique
DE69940039T DE69940039D1 (de) 1998-04-17 1999-04-12 Modem mit einer Vorrichtung zum Erkennung des Belegungszustands einer Fernsprechleitung
US09/290,624 US6292546B1 (en) 1998-04-17 1999-04-13 Modem including a device for detecting the busy state of a telephone line
JP11106973A JPH11331430A (ja) 1998-04-17 1999-04-14 電話線の話中状態を検出するデバイスを有するモデム
CN99105794.5A CN1119011C (zh) 1998-04-17 1999-04-16 包括用于检测电话线路的繁忙状态的装置的调制解调器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9804848A FR2777727B1 (fr) 1998-04-17 1998-04-17 Modem comportant un dispositif de detection de l'occupation d'une ligne telephonique

Publications (2)

Publication Number Publication Date
FR2777727A1 FR2777727A1 (fr) 1999-10-22
FR2777727B1 true FR2777727B1 (fr) 2000-06-30

Family

ID=9525377

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9804848A Expired - Fee Related FR2777727B1 (fr) 1998-04-17 1998-04-17 Modem comportant un dispositif de detection de l'occupation d'une ligne telephonique

Country Status (6)

Country Link
US (1) US6292546B1 (fr)
EP (1) EP0951170B1 (fr)
JP (1) JPH11331430A (fr)
CN (1) CN1119011C (fr)
DE (1) DE69940039D1 (fr)
FR (1) FR2777727B1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2788184B1 (fr) * 1998-12-31 2001-03-02 Thomson Multimedia Sa Methode, dispositif de detection de l'appel d'un telephone et modem comportant un tel dispositif
US6681011B1 (en) * 2000-04-11 2004-01-20 General Electric Company Method and modem circuit using a dither signal for determining connection status of a phone line
KR100397681B1 (ko) * 2001-07-27 2003-09-13 프롬투정보통신(주) 전화기 인식을 위한 저주파 신호 발생장치 및 방법
CN100442059C (zh) * 2004-05-21 2008-12-10 特克特朗尼克公司 在电子测试仪器中用于将输入信道隔离的装置
US7310521B2 (en) * 2005-01-18 2007-12-18 General Motors Corporation Method to reduce modem call establishment time to a telematics unit
US8223958B2 (en) * 2005-10-27 2012-07-17 Hewlett-Packard Development Company, L.P. Determining an active line

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4958371A (en) * 1988-04-19 1990-09-18 Control Data Corporation Method and apparatus for determining when a telephone handset is off-hook
US5140631A (en) * 1990-10-02 1992-08-18 Intertex Data Ab Apparatus and method for determining the state of a telephone line
US5506891A (en) * 1993-07-06 1996-04-09 Cirrus Logic, Inc. Method and apparatus for detecting the connection status of an extension phone connected to a voice/fax/data modem
US5422939A (en) * 1993-08-05 1995-06-06 Schlumberger Industries, Inc. Parallel off-hook detection for both line-available and phone pick-up detection
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
EP0868810B1 (fr) * 1995-12-22 2006-09-06 Thomson Multimedia Inc. Systeme automatique de transfert pour abonnes

Also Published As

Publication number Publication date
FR2777727A1 (fr) 1999-10-22
CN1240322A (zh) 2000-01-05
EP0951170A1 (fr) 1999-10-20
US6292546B1 (en) 2001-09-18
JPH11331430A (ja) 1999-11-30
DE69940039D1 (de) 2009-01-22
CN1119011C (zh) 2003-08-20
EP0951170B1 (fr) 2008-12-10

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Legal Events

Date Code Title Description
ST Notification of lapse

Effective date: 20091231