ES533439A0 - Un circuito de manos libres para un aparato telefonico - Google Patents

Un circuito de manos libres para un aparato telefonico

Info

Publication number
ES533439A0
ES533439A0 ES533439A ES533439A ES533439A0 ES 533439 A0 ES533439 A0 ES 533439A0 ES 533439 A ES533439 A ES 533439A ES 533439 A ES533439 A ES 533439A ES 533439 A0 ES533439 A0 ES 533439A0
Authority
ES
Spain
Prior art keywords
hands
telephone device
free circuit
free
circuit
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
ES533439A
Other languages
English (en)
Other versions
ES8601604A1 (es
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana 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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES8601604A1 publication Critical patent/ES8601604A1/es
Publication of ES533439A0 publication Critical patent/ES533439A0/es
Granted 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
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • 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
    • H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Telephone Function (AREA)
  • Mobile Radio Communication Systems (AREA)
ES533439A 1983-06-16 1984-06-15 Un circuito de manos libres para un aparato telefonico Granted ES533439A0 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/505,428 US4497980A (en) 1983-06-16 1983-06-16 Handsfree circuit for telephone instrument

Publications (2)

Publication Number Publication Date
ES8601604A1 ES8601604A1 (es) 1985-10-16
ES533439A0 true ES533439A0 (es) 1985-10-16

Family

ID=24010271

Family Applications (1)

Application Number Title Priority Date Filing Date
ES533439A Granted ES533439A0 (es) 1983-06-16 1984-06-15 Un circuito de manos libres para un aparato telefonico

Country Status (7)

Country Link
US (1) US4497980A (es)
EP (1) EP0129208A3 (es)
JP (1) JPS6074753A (es)
BR (1) BR8402439A (es)
CA (1) CA1215187A (es)
ES (1) ES533439A0 (es)
MX (1) MX154969A (es)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3412111A1 (de) * 1984-03-31 1985-10-10 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung fuer eine sprachgesteuerte freisprecheinrichtung
JPS61224548A (ja) * 1985-03-28 1986-10-06 Toshiba Corp 電話機
US4636586A (en) * 1985-09-20 1987-01-13 Rca Corporation Speakerphone with adaptive cancellation of room echoes
JPH036057Y2 (es) * 1985-10-29 1991-02-15
DE3609706C1 (de) * 1986-03-21 1987-11-05 Siemens Ag Verfahren zur elektronischen Nachbildung des Gabelumschalters und der Freisprech-Lauthoertaste in einer Freisprech-Lauthoerfernsprechstation
JPS6386945A (ja) * 1986-09-30 1988-04-18 Toshiba Corp キ−入力確認音発生装置
US5172408A (en) * 1990-08-01 1992-12-15 At&T Bell Laboratories Speakerphone state-controlled alerting arrangement
US5373554A (en) * 1992-06-11 1994-12-13 Brother Kogyo Kabushiki Kaisha Telephone having separate power circuit for supplying power to speech network
GB2271247B (en) * 1992-10-05 1997-02-19 Motorola Israel Ltd A radio telephone for a vehicle
CA2146596C (en) * 1994-04-29 1999-09-21 Harry W. Moore, Iii Loop current detector
US5991398A (en) * 1998-04-17 1999-11-23 Ameritech Corporation Telephone terminal apparatus and method
US6236969B1 (en) 1998-07-31 2001-05-22 Jonathan P. Ruppert Wearable telecommunications apparatus with voice/speech control features
JP3859369B2 (ja) * 1998-09-18 2006-12-20 株式会社東芝 メッセージ中継装置及び方法
KR20000062086A (ko) * 1999-03-30 2000-10-25 윤종용 휴대폰에서 스피커폰 모드시 음성신호의 송/수신 상태 표시방법
US7027569B2 (en) * 2002-02-11 2006-04-11 Prologue Communications, Inc. Telephone call screening system and method and caller registration system and method for use therewith

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1816146B2 (de) * 1968-12-20 1972-02-10 Siemens AG, 1000 Berlin u. 8000 München Schaltungsanordnung fuer lautfernsprechstationen
US4115659A (en) * 1977-06-16 1978-09-19 Abram N. Spanel Electroacoustical telephone adapter
DE2826671C3 (de) * 1978-06-19 1981-08-06 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung für einen Fernsprechapparat mit einer Freisprecheinrichtung
CA1186826A (en) * 1981-03-18 1985-05-07 Jin H. Yun Loudspeaker telephone system
JPS5846758A (ja) * 1981-09-16 1983-03-18 Iwatsu Electric Co Ltd 電話装置

Also Published As

Publication number Publication date
EP0129208A2 (en) 1984-12-27
MX154969A (es) 1988-01-14
US4497980A (en) 1985-02-05
ES8601604A1 (es) 1985-10-16
JPS6074753A (ja) 1985-04-27
BR8402439A (pt) 1985-04-02
EP0129208A3 (en) 1986-07-23
CA1215187A (en) 1986-12-09

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