CA976677A - Loudspeaking communication terminal apparatus and method of operation - Google Patents

Loudspeaking communication terminal apparatus and method of operation

Info

Publication number
CA976677A
CA976677A CA165,801A CA165801A CA976677A CA 976677 A CA976677 A CA 976677A CA 165801 A CA165801 A CA 165801A CA 976677 A CA976677 A CA 976677A
Authority
CA
Canada
Prior art keywords
communication terminal
terminal apparatus
loudspeaking
loudspeaking communication
terminal
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
CA165,801A
Other versions
CA165801S (en
Inventor
James L.E. Thompson
Wallace E. Clarke
James Gale
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.)
Nortel Networks Ltd
Original Assignee
Northern Electric Co Ltd
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 Northern Electric Co Ltd filed Critical Northern Electric Co Ltd
Priority to CA165,801A priority Critical patent/CA976677A/en
Priority to SE7403134A priority patent/SE400148B/en
Priority to DE19742411501 priority patent/DE2411501C3/en
Priority to NLAANVRAGE7403286,A priority patent/NL169809C/en
Priority to FR7408283A priority patent/FR2221885B1/fr
Priority to IE528/74A priority patent/IE40708B1/en
Priority to BR741879A priority patent/BR7401879D0/en
Priority to BE141936A priority patent/BE812212A/en
Priority to GB1100174A priority patent/GB1444828A/en
Priority to AU66579/74A priority patent/AU476504B2/en
Priority to IT20494/74A priority patent/IT1025013B/en
Priority to ZA00741555*[A priority patent/ZA741555B/en
Application granted granted Critical
Publication of CA976677A publication Critical patent/CA976677A/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
    • H04M9/10—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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Amplifiers (AREA)
CA165,801A 1973-03-12 1973-03-12 Loudspeaking communication terminal apparatus and method of operation Expired CA976677A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
CA165,801A CA976677A (en) 1973-03-12 1973-03-12 Loudspeaking communication terminal apparatus and method of operation
SE7403134A SE400148B (en) 1973-03-12 1974-03-08 SPEAKING END APPARATUS
DE19742411501 DE2411501C3 (en) 1973-03-12 1974-03-11 Circuit arrangement and method for operating a loudspeaker device
FR7408283A FR2221885B1 (en) 1973-03-12 1974-03-12
IE528/74A IE40708B1 (en) 1973-03-12 1974-03-12 Loudspeaking communication terminal apparatus and method of oeration
BR741879A BR7401879D0 (en) 1973-03-12 1974-03-12 INTERCOMMUNICATING DEVICE AND DEVICE AND PROCESS FOR ITS ACHIEVEMENT
NLAANVRAGE7403286,A NL169809C (en) 1973-03-12 1974-03-12 SPEAKING TELEPHONE.
BE141936A BE812212A (en) 1973-03-12 1974-03-12 COMMUNICATION TERMINAL WITH AMPLIFIED RECEPTION AND METHOD FOR IMPLEMENTING IT
GB1100174A GB1444828A (en) 1973-03-12 1974-03-12
AU66579/74A AU476504B2 (en) 1973-03-12 1974-03-12 Loudspeaking communication terminal apparatus and method of operation
IT20494/74A IT1025013B (en) 1973-03-12 1974-04-08 RICE TRASMISSIONE COMMUNICATION TERMINAL EQUIPMENT
ZA00741555*[A ZA741555B (en) 1973-03-12 1974-04-09 Loudspeaker communication terminal apparatus and method of operation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA165,801A CA976677A (en) 1973-03-12 1973-03-12 Loudspeaking communication terminal apparatus and method of operation

Publications (1)

Publication Number Publication Date
CA976677A true CA976677A (en) 1975-10-21

Family

ID=4096059

Family Applications (1)

Application Number Title Priority Date Filing Date
CA165,801A Expired CA976677A (en) 1973-03-12 1973-03-12 Loudspeaking communication terminal apparatus and method of operation

Country Status (11)

Country Link
AU (1) AU476504B2 (en)
BE (1) BE812212A (en)
BR (1) BR7401879D0 (en)
CA (1) CA976677A (en)
FR (1) FR2221885B1 (en)
GB (1) GB1444828A (en)
IE (1) IE40708B1 (en)
IT (1) IT1025013B (en)
NL (1) NL169809C (en)
SE (1) SE400148B (en)
ZA (1) ZA741555B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4178548A (en) * 1976-10-04 1979-12-11 Geraldine E. Thompson Voice actuated mobile radio
DE2842369A1 (en) * 1978-09-28 1980-04-10 Siemens Ag CIRCUIT ARRANGEMENT FOR A VOICE-CONTROLLED SPEAKER STATION IN TELECOMMUNICATION, IN PARTICULAR TELEPHONE SYSTEMS
GB2174578B (en) * 1985-05-04 1988-11-09 Stc Plc Loud speaking telephone
FI73341C (en) * 1985-08-06 1987-09-10 Outel Oy MELLANFOERSTAERKARE SOM ANVAENDS I TVAOLEDNINGSFOERBINDELSER I ETT VALBART TELEFONNAET SAMT FOERFARANDE FOER REGLERING AV DESS FOERSTAERKNING.
CA1291837C (en) * 1987-07-15 1991-11-05 Juro Ohga Electronic telephone terminal having noise suppression function

Also Published As

Publication number Publication date
GB1444828A (en) 1976-08-04
NL169809C (en) 1982-08-16
ZA741555B (en) 1975-02-26
IE40708B1 (en) 1979-08-01
DE2411501B2 (en) 1975-08-21
IT1025013B (en) 1978-08-10
DE2411501A1 (en) 1974-10-10
SE400148B (en) 1978-03-13
BE812212A (en) 1974-07-31
AU476504B2 (en) 1976-09-23
FR2221885A1 (en) 1974-10-11
FR2221885B1 (en) 1982-04-23
BR7401879D0 (en) 1974-11-19
NL7403286A (en) 1974-09-16
AU6657974A (en) 1975-09-18
NL169809B (en) 1982-03-16

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