DE69025362T2 - Handfreier Telefonapparat - Google Patents

Handfreier Telefonapparat

Info

Publication number
DE69025362T2
DE69025362T2 DE1990625362 DE69025362T DE69025362T2 DE 69025362 T2 DE69025362 T2 DE 69025362T2 DE 1990625362 DE1990625362 DE 1990625362 DE 69025362 T DE69025362 T DE 69025362T DE 69025362 T2 DE69025362 T2 DE 69025362T2
Authority
DE
Germany
Prior art keywords
hands
free telephone
telephone
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.)
Expired - Fee Related
Application number
DE1990625362
Other languages
English (en)
Other versions
DE69025362D1 (de
Inventor
Yukio Murata
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Application granted granted Critical
Publication of DE69025362D1 publication Critical patent/DE69025362D1/de
Publication of DE69025362T2 publication Critical patent/DE69025362T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04M9/10—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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/40—Applications of speech amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Function (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transceivers (AREA)
DE1990625362 1989-07-24 1990-07-24 Handfreier Telefonapparat Expired - Fee Related DE69025362T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18881289 1989-07-24

Publications (2)

Publication Number Publication Date
DE69025362D1 DE69025362D1 (de) 1996-03-28
DE69025362T2 true DE69025362T2 (de) 1996-07-04

Family

ID=16230247

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1990625362 Expired - Fee Related DE69025362T2 (de) 1989-07-24 1990-07-24 Handfreier Telefonapparat

Country Status (5)

Country Link
EP (1) EP0410698B1 (de)
JP (1) JP2569917B2 (de)
AU (2) AU5974990A (de)
CA (1) CA2021793C (de)
DE (1) DE69025362T2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1852836A3 (de) 1999-05-26 2011-03-30 Johnson Controls Technology Company Drahtloses Kommunikationssystem und -verfahren
US7346374B2 (en) 1999-05-26 2008-03-18 Johnson Controls Technology Company Wireless communications system and method
KR20010000166A (ko) * 2000-07-18 2001-01-05 김원만 에프엠 신호를 이용한 휴대폰의 핸드 프리 장치
WO2009082378A2 (en) 2006-10-11 2009-07-02 Johnson Controls Technology Company Wireless network selection
DE102017209209A1 (de) * 2017-05-31 2018-12-06 Laird Dabendorf Gmbh Signalkopplungsvorrichtung und Verfahren zum Betrieb einer Signalkopplungsvorrichtung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942116A (en) * 1975-03-13 1976-03-02 California Microwave, Inc. Transceiver having improved voice actuated carrier and echo suppression circuit
EP0233216A1 (de) * 1985-08-20 1987-08-26 Motorola, Inc. Lautsprecher für funk- und landfernsprecher
US4811390A (en) * 1985-09-19 1989-03-07 Western Mobile Telephone Co. Control circuit for mobile telephone with full duplex operation capability
GB2197166A (en) * 1986-11-07 1988-05-11 Storno As Controlling gain in speech-controlled telephones

Also Published As

Publication number Publication date
AU661615B2 (en) 1995-07-27
AU5023793A (en) 1993-12-23
CA2021793A1 (en) 1991-01-25
DE69025362D1 (de) 1996-03-28
EP0410698A2 (de) 1991-01-30
AU5974990A (en) 1991-01-24
JPH03128558A (ja) 1991-05-31
EP0410698A3 (en) 1992-05-06
CA2021793C (en) 1994-10-04
JP2569917B2 (ja) 1997-01-08
EP0410698B1 (de) 1996-02-14

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee