AU476504B2 - Loudspeaking communication terminal apparatus and method of operation - Google Patents

Loudspeaking communication terminal apparatus and method of operation

Info

Publication number
AU476504B2
AU476504B2 AU66579/74A AU6657974A AU476504B2 AU 476504 B2 AU476504 B2 AU 476504B2 AU 66579/74 A AU66579/74 A AU 66579/74A AU 6657974 A AU6657974 A AU 6657974A AU 476504 B2 AU476504 B2 AU 476504B2
Authority
AU
Australia
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
AU66579/74A
Other languages
English (en)
Other versions
AU6657974A (en
Inventor
WALLACE EUGENE CLARKE and JAMES GALE JAMES LAWRENCE EARL THOMPSON
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
Publication of AU6657974A publication Critical patent/AU6657974A/en
Application granted granted Critical
Publication of AU476504B2 publication Critical patent/AU476504B2/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)
AU66579/74A 1973-03-12 1974-03-12 Loudspeaking communication terminal apparatus and method of operation Expired AU476504B2 (en)

Applications Claiming Priority (2)

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
CACA165,801 1973-03-12

Publications (2)

Publication Number Publication Date
AU6657974A AU6657974A (en) 1975-09-18
AU476504B2 true AU476504B2 (en) 1976-09-23

Family

ID=4096059

Family Applications (1)

Application Number Title Priority Date Filing Date
AU66579/74A Expired AU476504B2 (en) 1973-03-12 1974-03-12 Loudspeaking communication terminal apparatus and method of operation

Country Status (11)

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

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 (de) * 1978-09-28 1980-04-10 Siemens Ag Schaltungsanordnung fuer eine sprachgesteuerte lautfernsprechstation in fernmelde-, insbesondere fernsprechanlagen
GB2174578B (en) * 1985-05-04 1988-11-09 Stc Plc Loud speaking telephone
FI73341C (fi) * 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
CA976677A (en) 1975-10-21
NL169809B (nl) 1982-03-16
BR7401879D0 (pt) 1974-11-19
GB1444828A (pt) 1976-08-04
NL7403286A (pt) 1974-09-16
DE2411501A1 (de) 1974-10-10
DE2411501B2 (de) 1975-08-21
NL169809C (nl) 1982-08-16
ZA741555B (en) 1975-02-26
SE400148B (sv) 1978-03-13
BE812212A (fr) 1974-07-31
IE40708B1 (en) 1979-08-01
FR2221885B1 (pt) 1982-04-23
AU6657974A (en) 1975-09-18
FR2221885A1 (pt) 1974-10-11
IT1025013B (it) 1978-08-10

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