GB2161047B - Improvements in telephone instruments - Google Patents

Improvements in telephone instruments

Info

Publication number
GB2161047B
GB2161047B GB08416415A GB8416415A GB2161047B GB 2161047 B GB2161047 B GB 2161047B GB 08416415 A GB08416415 A GB 08416415A GB 8416415 A GB8416415 A GB 8416415A GB 2161047 B GB2161047 B GB 2161047B
Authority
GB
United Kingdom
Prior art keywords
telephone instruments
instruments
telephone
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
Application number
GB08416415A
Other versions
GB2161047A (en
GB8416415D0 (en
Inventor
Kenneth Alexander Manson Arton
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.)
STC PLC
Original Assignee
STC PLC
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 STC PLC filed Critical STC PLC
Priority to GB08416415A priority Critical patent/GB2161047B/en
Publication of GB8416415D0 publication Critical patent/GB8416415D0/en
Priority to AU43467/85A priority patent/AU4346785A/en
Priority to DE19853522915 priority patent/DE3522915A1/en
Priority to ES544628A priority patent/ES8609854A1/en
Priority to JP60139218A priority patent/JPS6115451A/en
Priority to FR8509903A priority patent/FR2566980A1/en
Priority to IT8521356A priority patent/IT1206478B/en
Publication of GB2161047A publication Critical patent/GB2161047A/en
Application granted granted Critical
Publication of GB2161047B publication Critical patent/GB2161047B/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)
  • Analogue/Digital Conversion (AREA)
  • Interface Circuits In Exchanges (AREA)
GB08416415A 1984-06-28 1984-06-28 Improvements in telephone instruments Expired GB2161047B (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB08416415A GB2161047B (en) 1984-06-28 1984-06-28 Improvements in telephone instruments
AU43467/85A AU4346785A (en) 1984-06-28 1985-06-11 Telephone instruments
DE19853522915 DE3522915A1 (en) 1984-06-28 1985-06-27 HANDSFREE
ES544628A ES8609854A1 (en) 1984-06-28 1985-06-27 Improvements in telephone instruments
JP60139218A JPS6115451A (en) 1984-06-28 1985-06-27 Improvement of telephone set
FR8509903A FR2566980A1 (en) 1984-06-28 1985-06-28 TRANSMISSION AND RECEPTION PATH MITIGATION CIRCUIT FOR TELEPHONE APPARATUS AND APPARATUS INCLUDING SAME
IT8521356A IT1206478B (en) 1984-06-28 1985-06-28 CIRCUIT FOR THE CONTROLLED ATTENUATION OF THE COURSES OF THE SPEECH OF TRANSMISSION AND RECEPTION OF A SPEAKER TELEPHONE EQUIPMENT AND TELEPHONE DEVICE INCORPORATING SUCH CIRCUIT.

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 (3)

Publication Number Publication Date
GB8416415D0 GB8416415D0 (en) 1984-08-01
GB2161047A GB2161047A (en) 1986-01-02
GB2161047B true GB2161047B (en) 1987-09-16

Family

ID=10563086

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08416415A Expired GB2161047B (en) 1984-06-28 1984-06-28 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
EP0290952B1 (en) * 1987-05-15 1992-11-04 Alcatel SEL Aktiengesellschaft Speech control circuitry for a telecommunication terminal
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
US5007046A (en) * 1988-12-28 1991-04-09 At&T Bell Laboratories Computer controlled adaptive speakerphone
US4887288A (en) * 1988-12-28 1989-12-12 American Telephone And Telegraph Company Self calibration arrangement for a voice switched speakerphone
US4959857A (en) * 1988-12-28 1990-09-25 At&T Bell Laboratories Acoustic calibration arrangement for a voice switched speakerphone
US4901346A (en) * 1988-12-28 1990-02-13 American Telephone And Telegraph Co. Computer controlled speakerphone for adapting to a communication line
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
IT1206478B (en) 1989-04-27
ES8609854A1 (en) 1986-07-16
FR2566980A1 (en) 1986-01-03
IT8521356A0 (en) 1985-06-28
GB2161047A (en) 1986-01-02
DE3522915A1 (en) 1986-01-09
ES544628A0 (en) 1986-07-16
AU4346785A (en) 1986-01-02
GB8416415D0 (en) 1984-08-01
JPS6115451A (en) 1986-01-23

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20020628