ES530643A0 - Un sistema telefonico con posibilidad de manos libres - Google Patents

Un sistema telefonico con posibilidad de manos libres

Info

Publication number
ES530643A0
ES530643A0 ES530643A ES530643A ES530643A0 ES 530643 A0 ES530643 A0 ES 530643A0 ES 530643 A ES530643 A ES 530643A ES 530643 A ES530643 A ES 530643A ES 530643 A0 ES530643 A0 ES 530643A0
Authority
ES
Spain
Prior art keywords
possibility
telephone system
hands free
hands
free
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
ES530643A
Other languages
English (en)
Other versions
ES8503908A1 (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 ES8503908A1 publication Critical patent/ES8503908A1/es
Publication of ES530643A0 publication Critical patent/ES530643A0/es
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Interface Circuits In Exchanges (AREA)
ES530643A 1983-03-15 1984-03-15 Un sistema telefonico con posibilidad de manos libres Granted ES530643A0 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08307143A GB2137049B (en) 1983-03-15 1983-03-15 Handsfree telephone

Publications (2)

Publication Number Publication Date
ES8503908A1 ES8503908A1 (es) 1985-03-16
ES530643A0 true ES530643A0 (es) 1985-03-16

Family

ID=10539624

Family Applications (1)

Application Number Title Priority Date Filing Date
ES530643A Granted ES530643A0 (es) 1983-03-15 1984-03-15 Un sistema telefonico con posibilidad de manos libres

Country Status (7)

Country Link
US (1) US4564939A (es)
EP (1) EP0118920A3 (es)
JP (1) JPS6016751A (es)
AU (1) AU2549184A (es)
BE (1) BE899159R (es)
ES (1) ES530643A0 (es)
GB (1) GB2137049B (es)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2137454A (en) * 1983-03-01 1984-10-03 Standard Telephones Cables Ltd Handsfree telephone system
GB2197166A (en) * 1986-11-07 1988-05-11 Storno As Controlling gain in speech-controlled telephones
US4794520A (en) * 1987-03-30 1988-12-27 C-Guard Laboratories, Inc. Interface system for computer port sharing of multiple devices
US5410595A (en) * 1992-11-12 1995-04-25 Motorola, Inc. Apparatus and method for noise reduction for a full-duplex speakerphone or the like
US5353348A (en) * 1993-05-14 1994-10-04 Jrc International, Inc. Double echo cancelling system
US5323458A (en) * 1993-10-25 1994-06-21 Motorola Inc. Echo cancellation in a full-duplex speakerphone

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO134477C (es) * 1974-10-29 1976-10-13 Manus Max
US3976847A (en) * 1975-11-12 1976-08-24 Bell Telephone Laboratories, Incorporated Key telephone system intercom arrangement
DE2638286C3 (de) * 1976-08-25 1979-03-01 Dasy Inter S.A., Genf (Schweiz) Schaltungsanordnung für ein Freisprechertelefon
DE2659028C3 (de) * 1976-12-27 1979-05-31 Dasy Inter S.A., Genf (Schweiz) Schaltungsanordnung zum Verhindern von Rückkopplungen
US4063047A (en) * 1977-03-04 1977-12-13 Bell Telephone Laboratories, Incorporated Key telephone system multilink hands free answer circuit
US4123626A (en) * 1977-11-23 1978-10-31 Northern Telecom Limited Digital echo attenuation circuit for a telephone system
FR2412210A1 (fr) * 1977-12-14 1979-07-13 Cit Alcatel Poste telephonique a haut-parleur
JPS5919506B2 (ja) * 1978-04-14 1984-05-07 株式会社東芝 電話交換機
CA1166777A (en) * 1981-03-23 1984-05-01 Gordon D. Benning Home telephone exchange
DE3137314C2 (de) * 1981-09-16 1984-03-29 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung für sprachgesteuerte Freisprechgeräte

Also Published As

Publication number Publication date
ES8503908A1 (es) 1985-03-16
GB2137049B (en) 1986-05-14
JPS6016751A (ja) 1985-01-28
BE899159R (fr) 1984-09-17
EP0118920A3 (de) 1985-10-23
AU2549184A (en) 1984-09-20
EP0118920A2 (de) 1984-09-19
US4564939A (en) 1986-01-14
GB2137049A (en) 1984-09-26
GB8307143D0 (en) 1983-04-20

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