DE69528317D1 - Fernsprechtondetektorschaltung - Google Patents

Fernsprechtondetektorschaltung

Info

Publication number
DE69528317D1
DE69528317D1 DE69528317T DE69528317T DE69528317D1 DE 69528317 D1 DE69528317 D1 DE 69528317D1 DE 69528317 T DE69528317 T DE 69528317T DE 69528317 T DE69528317 T DE 69528317T DE 69528317 D1 DE69528317 D1 DE 69528317D1
Authority
DE
Germany
Prior art keywords
fernsprechtondetektorschaltung
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 - Lifetime
Application number
DE69528317T
Other languages
English (en)
Inventor
Francois Druilhe
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.)
STMicroelectronics SA
Original Assignee
STMicroelectronics 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 STMicroelectronics SA filed Critical STMicroelectronics SA
Application granted granted Critical
Publication of DE69528317D1 publication Critical patent/DE69528317D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
    • 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
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Complex Calculations (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephonic Communication Services (AREA)
DE69528317T 1994-05-27 1995-05-23 Fernsprechtondetektorschaltung Expired - Lifetime DE69528317D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9406724A FR2720577B1 (fr) 1994-05-27 1994-05-27 Circuit de détection de tonalité téléphonique.

Publications (1)

Publication Number Publication Date
DE69528317D1 true DE69528317D1 (de) 2002-10-31

Family

ID=9463781

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69528317T Expired - Lifetime DE69528317D1 (de) 1994-05-27 1995-05-23 Fernsprechtondetektorschaltung

Country Status (5)

Country Link
US (1) US5659606A (de)
EP (1) EP0689366B1 (de)
JP (1) JPH0851487A (de)
DE (1) DE69528317D1 (de)
FR (1) FR2720577B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5802112A (en) * 1996-01-16 1998-09-01 Transcendat Inc. Multi-level, multi-frequency interference pattern analog waveform encoding of digital data for transmission
EP0818113A1 (de) * 1996-01-26 1998-01-14 Koninklijke Philips Electronics N.V. Übertragungssystem mit verbesserter tonerkennung
US6038262A (en) * 1998-06-09 2000-03-14 Transcendata, Inc. Method and apparatus for compensation of electro-magnetic distortion using weighted feedback delay for amplitude coded sinusoidal waveform generation and transmission
US6937717B2 (en) * 2001-03-29 2005-08-30 Agere Systems Inc. Low power signal detection
US20030081756A1 (en) * 2001-10-23 2003-05-01 Chan Norman C. Multi-detector call classifier

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4354248A (en) * 1979-11-28 1982-10-12 Motorola, Inc. Programmable multifrequency tone receiver
US4635250A (en) * 1984-04-13 1987-01-06 International Business Machines Corporation Full-duplex one-sided cross-point switch
US4626629A (en) * 1984-12-14 1986-12-02 Gte Communication Systems Corporation Digital multifrequency signal receiver
US4718057A (en) * 1985-08-30 1988-01-05 Advanced Micro Devices, Inc. Streamlined digital signal processor
US4709344A (en) * 1985-10-02 1987-11-24 Motorola, Inc. Programmable multifrequency digital tone receiver
US4908825A (en) * 1988-04-08 1990-03-13 Northern Telecom Limited Memory organization and output sequencer for a signal processor
US5072217A (en) * 1989-10-31 1991-12-10 International Business Machines Corporation One-sided crosspoint switch with distributed control
US5113431A (en) * 1989-10-31 1992-05-12 At&T Bell Laboratories Distributed control teleconferencing voice bridge
JP2701513B2 (ja) * 1990-03-29 1998-01-21 日本電気株式会社 回線切替制御方式
US5325425A (en) * 1990-04-24 1994-06-28 The Telephone Connection Method for monitoring telephone call progress
DE4017027A1 (de) * 1990-05-26 1991-11-28 Philips Patentverwaltung Vermittlungssystem mit einer konferenzeinrichtung
US5420860A (en) * 1990-06-18 1995-05-30 Intelect, Inc. Volume control for digital communication system
JPH04123621A (ja) * 1990-09-14 1992-04-23 Nippon Telegr & Teleph Corp <Ntt> 反響消去装置
GB2255472B (en) * 1991-04-30 1995-05-10 Rockwell International Corp Telecommunication data analysis and transmission
US5255264A (en) * 1991-09-26 1993-10-19 Ipc Information Systems, Inc. Distributed control switching network for multi-line telephone communications
FI89659C (fi) * 1991-11-04 1993-10-25 Nokia Telecommunications Oy Foerfarande foer identifiering av en spaerrsignal hos en ekoslaeckare
JP3069419B2 (ja) * 1991-11-27 2000-07-24 ローム株式会社 クロスポイントミキサ及びこれを備える電話機
US5325427A (en) * 1992-03-23 1994-06-28 At&T Bell Laboratories Apparatus and robust method for detecting tones
US5353342A (en) * 1992-12-08 1994-10-04 Bell Communications Research, Inc. Adaptive multitone signaling method
JPH06318885A (ja) * 1993-03-11 1994-11-15 Nec Corp 帯域分割適応フィルタによる未知システム同定の方法及び装置
US5353348A (en) * 1993-05-14 1994-10-04 Jrc International, Inc. Double echo cancelling system
US5363443A (en) * 1993-12-08 1994-11-08 At&T Bell Laboratories Differing frequency sine wave generation from a look-up table
US5416836A (en) * 1993-12-17 1995-05-16 At&T Corp. Disconnect signalling detection arrangement
US5533112A (en) * 1994-03-31 1996-07-02 Intel Corporation Volume control in digital teleconferencing

Also Published As

Publication number Publication date
US5659606A (en) 1997-08-19
FR2720577A1 (fr) 1995-12-01
EP0689366B1 (de) 2002-09-25
FR2720577B1 (fr) 1996-08-14
JPH0851487A (ja) 1996-02-20
EP0689366A1 (de) 1995-12-27

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Legal Events

Date Code Title Description
8332 No legal effect for de