ES544628A0 - A CONTROLLED DIMMING CIRCUIT FOR THE TRANSMISSION AND RECEPTION CONVERSATION PATHS FOR A HANDS-FREE TELEPHONE INSTRUMENT - Google Patents

A CONTROLLED DIMMING CIRCUIT FOR THE TRANSMISSION AND RECEPTION CONVERSATION PATHS FOR A HANDS-FREE TELEPHONE INSTRUMENT

Info

Publication number
ES544628A0
ES544628A0 ES544628A ES544628A ES544628A0 ES 544628 A0 ES544628 A0 ES 544628A0 ES 544628 A ES544628 A ES 544628A ES 544628 A ES544628 A ES 544628A ES 544628 A0 ES544628 A0 ES 544628A0
Authority
ES
Spain
Prior art keywords
hands
transmission
dimming circuit
free telephone
telephone instrument
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.)
Granted
Application number
ES544628A
Other languages
Spanish (es)
Other versions
ES8609854A1 (en
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of ES544628A0 publication Critical patent/ES544628A0/en
Publication of ES8609854A1 publication Critical patent/ES8609854A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/085—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using digital techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Analogue/Digital Conversion (AREA)
ES544628A 1984-06-28 1985-06-27 Improvements in telephone instruments Expired ES8609854A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08416415A GB2161047B (en) 1984-06-28 1984-06-28 Improvements in telephone instruments

Publications (2)

Publication Number Publication Date
ES544628A0 true ES544628A0 (en) 1986-07-16
ES8609854A1 ES8609854A1 (en) 1986-07-16

Family

ID=10563086

Family Applications (1)

Application Number Title Priority Date Filing Date
ES544628A Expired ES8609854A1 (en) 1984-06-28 1985-06-27 Improvements in telephone instruments

Country Status (7)

Country Link
JP (1) JPS6115451A (en)
AU (1) AU4346785A (en)
DE (1) DE3522915A1 (en)
ES (1) ES8609854A1 (en)
FR (1) FR2566980A1 (en)
GB (1) GB2161047B (en)
IT (1) IT1206478B (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4724540A (en) * 1986-09-02 1988-02-09 Motorola, Inc. Speakerphone with fast idle mode
GB2197166A (en) * 1986-11-07 1988-05-11 Storno As Controlling gain in speech-controlled telephones
DE3875650D1 (en) * 1987-05-15 1992-12-10 Standard Elektrik Lorenz Ag CIRCUIT ARRANGEMENT FOR VOICE CONTROL FOR A TERMINAL DEVICE OF MESSAGE TECHNOLOGY.
CA1291837C (en) * 1987-07-15 1991-11-05 Juro Ohga Electronic telephone terminal having noise suppression function
US4879745A (en) * 1988-10-12 1989-11-07 Ibm Corporation Half-duplex speakerphone
US4901346A (en) * 1988-12-28 1990-02-13 American Telephone And Telegraph Co. Computer controlled speakerphone for adapting to a communication line
US4887288A (en) * 1988-12-28 1989-12-12 American Telephone And Telegraph Company Self calibration arrangement for a voice switched speakerphone
US5007046A (en) * 1988-12-28 1991-04-09 At&T Bell Laboratories Computer controlled adaptive speakerphone
US4959857A (en) * 1988-12-28 1990-09-25 At&T Bell Laboratories Acoustic calibration arrangement for a voice switched speakerphone
KR920017511A (en) * 1991-02-28 1992-09-26 빈센트 죠셉 로너 Integrated speakerphone circuit and serial port interface for speakerphone
DE4130045A1 (en) * 1991-09-10 1993-03-18 Standard Elektrik Lorenz Ag CIRCUIT ARRANGEMENT FOR THE DYNAMIC CONTROL OF A VOICE TERMINAL
CA2052351C (en) * 1991-09-27 2000-05-23 Gordon J. Reesor Telephone handsfree algorithm
DE4416550C1 (en) * 1994-05-10 1995-09-21 Siemens Ag Loudspeaking telephone terminal circuit with earpiece loudness control
US6978009B1 (en) * 1996-08-20 2005-12-20 Legerity, Inc. Microprocessor-controlled full-duplex speakerphone using automatic gain control
JPH10304030A (en) 1997-04-28 1998-11-13 Saitama Nippon Denki Kk Portable telephone system
FR3028375B1 (en) * 2014-11-07 2017-11-24 Euro Prot Surveillance VOICE COMMUNICATION METHOD, AUDIO INTERFACE OF A SOCIAL ALARM SYSTEM, AND SOCIAL ALARM SYSTEM

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA996692A (en) * 1974-12-12 1976-09-07 Russell W. Brown Digital control of a loudspeaking telephone system
DE2651688A1 (en) * 1976-11-12 1978-05-24 Siemens Ag Full-duplex voice-controlled communications system - has voice direction recognition corrected according to noise level using digital circuit
JPS5797262A (en) * 1980-12-09 1982-06-16 Nippon Telegr & Teleph Corp <Ntt> Loud speaker telephone set system
GB2122851B (en) * 1982-06-10 1986-03-19 Standard Telephones Cables Ltd Loudspeaking telephones

Also Published As

Publication number Publication date
FR2566980A1 (en) 1986-01-03
IT1206478B (en) 1989-04-27
DE3522915A1 (en) 1986-01-09
GB8416415D0 (en) 1984-08-01
JPS6115451A (en) 1986-01-23
GB2161047A (en) 1986-01-02
AU4346785A (en) 1986-01-02
ES8609854A1 (en) 1986-07-16
GB2161047B (en) 1987-09-16
IT8521356A0 (en) 1985-06-28

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