IT1050035B - Sistema telefonico ad altoparlante a controllo digitale - Google Patents

Sistema telefonico ad altoparlante a controllo digitale

Info

Publication number
IT1050035B
IT1050035B IT30127/75A IT3012775A IT1050035B IT 1050035 B IT1050035 B IT 1050035B IT 30127/75 A IT30127/75 A IT 30127/75A IT 3012775 A IT3012775 A IT 3012775A IT 1050035 B IT1050035 B IT 1050035B
Authority
IT
Italy
Prior art keywords
digital control
telephone system
control speaker
speaker telephone
digital
Prior art date
Application number
IT30127/75A
Other languages
English (en)
Italian (it)
Original Assignee
Northern Electric Co
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 filed Critical Northern Electric Co
Application granted granted Critical
Publication of IT1050035B publication Critical patent/IT1050035B/it

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Analogue/Digital Conversion (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Transceivers (AREA)
IT30127/75A 1974-12-12 1975-12-09 Sistema telefonico ad altoparlante a controllo digitale IT1050035B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA215,876A CA996692A (en) 1974-12-12 1974-12-12 Digital control of a loudspeaking telephone system

Publications (1)

Publication Number Publication Date
IT1050035B true IT1050035B (it) 1981-03-10

Family

ID=4101835

Family Applications (1)

Application Number Title Priority Date Filing Date
IT30127/75A IT1050035B (it) 1974-12-12 1975-12-09 Sistema telefonico ad altoparlante a controllo digitale

Country Status (9)

Country Link
JP (1) JPS5183709A (no)
CA (1) CA996692A (no)
DE (1) DE2555552A1 (no)
FR (1) FR2294595A1 (no)
GB (1) GB1519607A (no)
IT (1) IT1050035B (no)
NL (1) NL7514138A (no)
NO (1) NO754207L (no)
SE (1) SE414856B (no)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2659028C3 (de) * 1976-12-27 1979-05-31 Dasy Inter S.A., Genf (Schweiz) Schaltungsanordnung zum Verhindern von Rückkopplungen
DE2952122A1 (de) * 1979-12-22 1981-06-25 Deutsche Itt Industries Gmbh, 7800 Freiburg Schaltungsanordnung fuer sprachgesteuerte freisprechgeraete
JPS5797262A (en) * 1980-12-09 1982-06-16 Nippon Telegr & Teleph Corp <Ntt> Loud speaker telephone set system
GB2137458B (en) * 1983-03-01 1986-11-19 Standard Telephones Cables Ltd Digital handsfree telephone
GB2161047B (en) * 1984-06-28 1987-09-16 Stc Plc Improvements in telephone instruments
GB2174578B (en) * 1985-05-04 1988-11-09 Stc Plc Loud speaking telephone
GB2197166A (en) * 1986-11-07 1988-05-11 Storno As Controlling gain in speech-controlled telephones
EP0271948A3 (en) * 1986-12-16 1989-05-03 Alcatel N.V. Telecommunication circuit
DE4130045A1 (de) * 1991-09-10 1993-03-18 Standard Elektrik Lorenz Ag Schaltungsanordnung zur dynamiksteuerung eines sprachendgeraetes

Also Published As

Publication number Publication date
JPS5183709A (no) 1976-07-22
GB1519607A (en) 1978-08-02
SE414856B (sv) 1980-08-18
NL7514138A (nl) 1976-06-15
FR2294595A1 (fr) 1976-07-09
DE2555552A1 (de) 1976-06-16
CA996692A (en) 1976-09-07
SE7514036L (sv) 1976-06-14
NO754207L (no) 1976-06-15

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