SE400148B - SPEAKING END APPARATUS - Google Patents

SPEAKING END APPARATUS

Info

Publication number
SE400148B
SE400148B SE7403134A SE7403134A SE400148B SE 400148 B SE400148 B SE 400148B SE 7403134 A SE7403134 A SE 7403134A SE 7403134 A SE7403134 A SE 7403134A SE 400148 B SE400148 B SE 400148B
Authority
SE
Sweden
Prior art keywords
end apparatus
speaking end
speaking
Prior art date
Application number
SE7403134A
Other languages
Swedish (sv)
Inventor
J L E Thompson
W E Clarke
J Gale
Original Assignee
Northern Telecom 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 Telecom Ltd filed Critical Northern Telecom Ltd
Publication of SE400148B publication Critical patent/SE400148B/en

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)
  • Amplifiers (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
SE7403134A 1973-03-12 1974-03-08 SPEAKING END APPARATUS SE400148B (en)

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
SE400148B true SE400148B (en) 1978-03-13

Family

ID=4096059

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7403134A SE400148B (en) 1973-03-12 1974-03-08 SPEAKING END APPARATUS

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
AU6657974A (en) 1975-09-18
BR7401879D0 (en) 1974-11-19
NL169809C (en) 1982-08-16
BE812212A (en) 1974-07-31
FR2221885A1 (en) 1974-10-11
NL7403286A (en) 1974-09-16
GB1444828A (en) 1976-08-04
ZA741555B (en) 1975-02-26
DE2411501A1 (en) 1974-10-10
IT1025013B (en) 1978-08-10
CA976677A (en) 1975-10-21
NL169809B (en) 1982-03-16
FR2221885B1 (en) 1982-04-23
AU476504B2 (en) 1976-09-23
DE2411501B2 (en) 1975-08-21
IE40708B1 (en) 1979-08-01

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