ZA756825B - System for control of speech direction in duplex telephone circuits - Google Patents

System for control of speech direction in duplex telephone circuits

Info

Publication number
ZA756825B
ZA756825B ZA00756825A ZA756825A ZA756825B ZA 756825 B ZA756825 B ZA 756825B ZA 00756825 A ZA00756825 A ZA 00756825A ZA 756825 A ZA756825 A ZA 756825A ZA 756825 B ZA756825 B ZA 756825B
Authority
ZA
South Africa
Prior art keywords
control
telephone circuits
speech direction
duplex telephone
duplex
Prior art date
Application number
ZA00756825A
Other languages
English (en)
Inventor
B Anderson
Original Assignee
Maxman Ag
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 Maxman Ag filed Critical Maxman Ag
Publication of ZA756825B publication Critical patent/ZA756825B/xx

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
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/001—Two-way communication systems between a limited number of parties

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
ZA00756825A 1974-10-29 1975-10-29 System for control of speech direction in duplex telephone circuits ZA756825B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO743893A NO134477C (en, 2012) 1974-10-29 1974-10-29

Publications (1)

Publication Number Publication Date
ZA756825B true ZA756825B (en) 1976-10-27

Family

ID=19881909

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00756825A ZA756825B (en) 1974-10-29 1975-10-29 System for control of speech direction in duplex telephone circuits

Country Status (15)

Country Link
US (1) US4052562A (en, 2012)
JP (2) JPS5167008A (en, 2012)
AT (1) AT358634B (en, 2012)
BE (1) BE835013A (en, 2012)
CA (1) CA1040332A (en, 2012)
CH (1) CH600711A5 (en, 2012)
DE (1) DE2546926C3 (en, 2012)
DK (1) DK152637C (en, 2012)
FR (1) FR2290108A1 (en, 2012)
GB (1) GB1507866A (en, 2012)
IT (1) IT1044596B (en, 2012)
NL (1) NL7512677A (en, 2012)
NO (1) NO134477C (en, 2012)
SE (1) SE400443B (en, 2012)
ZA (1) ZA756825B (en, 2012)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2638286C3 (de) * 1976-08-25 1979-03-01 Dasy Inter S.A., Genf (Schweiz) Schaltungsanordnung für ein Freisprechertelefon
US4215252A (en) * 1978-09-27 1980-07-29 Communications Satellite Corporation Video teleconference audio echo control unit
DE2952122A1 (de) * 1979-12-22 1981-06-25 Deutsche Itt Industries Gmbh, 7800 Freiburg Schaltungsanordnung fuer sprachgesteuerte freisprechgeraete
DE3007632A1 (de) * 1980-02-29 1981-09-10 Deutsche Itt Industries Gmbh, 7800 Freiburg Schaltungsanordnung zur rueckkopplungsverhinderung bei telefonapparaten mit freisprech- und/oder mithoermoeglichkeit
JPS5797262A (en) * 1980-12-09 1982-06-16 Nippon Telegr & Teleph Corp <Ntt> Loud speaker telephone set system
US4378603A (en) * 1980-12-23 1983-03-29 Motorola, Inc. Radiotelephone with hands-free operation
US4400584A (en) * 1982-04-05 1983-08-23 Motorola, Inc. Speakerphone for radio and, landline telephones
GB2122851B (en) * 1982-06-10 1986-03-19 Standard Telephones Cables Ltd Loudspeaking telephones
JPS5916434A (ja) * 1982-07-19 1984-01-27 Hitachi Ltd 光通信方式
GB2137454A (en) * 1983-03-01 1984-10-03 Standard Telephones Cables Ltd Handsfree telephone system
GB2137049B (en) * 1983-03-15 1986-05-14 Standard Telephones Cables Ltd Handsfree telephone
US4542263A (en) * 1984-03-07 1985-09-17 Oki Electric Industry Co., Ltd. Speech control circuit
US4860359A (en) * 1984-10-15 1989-08-22 Rockwell International Corporation Method of voice operated transmit control
CA1226981A (en) * 1984-10-30 1987-09-15 Novatel Communications Ltd. Two way telephone communication system
FI78373C (fi) * 1988-01-18 1989-07-10 Sostel Oy Telefontrafik- eller dataoeverfoeringssystem.
DE59008583D1 (de) * 1989-10-18 1995-04-06 Siemens Ag Verfahren zur automatischen Sprachrichtungsumschaltung und Schaltungsanordnung zur Durchführung des Verfahrens.
US7072476B2 (en) * 1997-02-18 2006-07-04 Matech, Inc. Audio headset
US5907538A (en) * 1997-02-18 1999-05-25 White; Donald R. Full duplex communication circuit with a transducer for simultaneously generating audio output and receiving audio input
WO2005048574A1 (en) * 2003-11-11 2005-05-26 Matech, Inc. Automatic-switching wireless communication device
US7881483B2 (en) * 2003-11-11 2011-02-01 Matech, Inc. Two-way communications device having a single transducer
JP2006108777A (ja) * 2004-09-30 2006-04-20 Toshiba Corp 電話端末及びこの電話端末を使用した電話システム、及び電話端末の制御方法
US8315379B2 (en) * 2004-11-10 2012-11-20 Matech, Inc. Single transducer full duplex talking circuit

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL225471A (en, 2012) * 1957-11-26 1900-01-01
NL267461A (en, 2012) * 1960-10-04 1900-01-01
DE1562130A1 (de) * 1968-01-12 1970-10-29 Lauffer Dr Ing Hans Wechselsprechanlage
BE786256A (fr) * 1971-07-15 1973-01-15 Philips Nv Dispositif de commutation commande par des signaux
FR2157143A5 (en, 2012) * 1971-10-19 1973-06-01 Queffeulou Jean Yves
NL155700B (nl) * 1971-12-08 1978-01-16 Philips Nv Luidsprekende telefooninrichting.
US3725585A (en) * 1972-03-21 1973-04-03 Itt Loudspeaking telephone station circuit
SE354557B (en, 2012) * 1972-03-22 1973-03-12 Ericsson Telefon Ab L M
US3832491A (en) * 1973-02-13 1974-08-27 Communications Satellite Corp Digital voice switch with an adaptive digitally-controlled threshold
FR2224961B1 (en, 2012) * 1973-04-06 1977-04-29 Voyer Paul

Also Published As

Publication number Publication date
ATA808375A (de) 1980-02-15
IT1044596B (it) 1980-03-31
JPS5167008A (en, 2012) 1976-06-10
NL7512677A (nl) 1976-05-04
DE2546926C3 (de) 1980-12-18
FR2290108B1 (en, 2012) 1979-06-15
JPS6244610Y2 (en, 2012) 1987-11-26
FR2290108A1 (fr) 1976-05-28
BE835013A (fr) 1976-02-16
NO743893L (en, 2012) 1976-04-30
CA1040332A (en) 1978-10-10
GB1507866A (en) 1978-04-19
DK152637C (da) 1988-08-15
SE400443B (sv) 1978-03-20
DK483775A (da) 1976-04-30
NO134477B (en, 2012) 1976-07-05
SE7512043L (sv) 1976-04-30
US4052562A (en) 1977-10-04
CH600711A5 (en, 2012) 1978-06-30
JPS5952767U (ja) 1984-04-06
DK152637B (da) 1988-03-28
DE2546926A1 (de) 1976-05-06
AT358634B (de) 1980-09-25
DE2546926B2 (de) 1980-04-24
AU8602675A (en) 1977-05-05
NO134477C (en, 2012) 1976-10-13

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