IT1154586B - Disposizione circuitale per un apparecchio telefonico per comunicazioni a viva voce - Google Patents

Disposizione circuitale per un apparecchio telefonico per comunicazioni a viva voce

Info

Publication number
IT1154586B
IT1154586B IT24414/82A IT2441482A IT1154586B IT 1154586 B IT1154586 B IT 1154586B IT 24414/82 A IT24414/82 A IT 24414/82A IT 2441482 A IT2441482 A IT 2441482A IT 1154586 B IT1154586 B IT 1154586B
Authority
IT
Italy
Prior art keywords
hands
telephone
free communications
circuit provision
provision
Prior art date
Application number
IT24414/82A
Other languages
English (en)
Other versions
IT8224414A0 (it
IT8224414A1 (it
Inventor
Frank Bahr
Werner Hubner
Hans-Gunther Luhmann
Gunter Schulz
Original Assignee
Deutsche Telephonwerk Kabel
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 Deutsche Telephonwerk Kabel filed Critical Deutsche Telephonwerk Kabel
Publication of IT8224414A0 publication Critical patent/IT8224414A0/it
Publication of IT8224414A1 publication Critical patent/IT8224414A1/it
Application granted granted Critical
Publication of IT1154586B publication Critical patent/IT1154586B/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
    • H04M9/10—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
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Telephone Function (AREA)
  • Amplifiers (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Telephone Set Structure (AREA)
  • Mobile Radio Communication Systems (AREA)
IT24414/82A 1981-12-03 1982-11-24 Disposizione circuitale per un apparecchio telefonico per comunicazioni a viva voce IT1154586B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813148305 DE3148305A1 (de) 1981-12-03 1981-12-03 Schaltungsanordnung fuer eine freisprecheinrichtung

Publications (3)

Publication Number Publication Date
IT8224414A0 IT8224414A0 (it) 1982-11-24
IT8224414A1 IT8224414A1 (it) 1984-05-24
IT1154586B true IT1154586B (it) 1987-01-21

Family

ID=6148050

Family Applications (1)

Application Number Title Priority Date Filing Date
IT24414/82A IT1154586B (it) 1981-12-03 1982-11-24 Disposizione circuitale per un apparecchio telefonico per comunicazioni a viva voce

Country Status (10)

Country Link
BE (1) BE894144A (it)
DE (1) DE3148305A1 (it)
DK (1) DK534682A (it)
FR (1) FR2517911B1 (it)
GB (1) GB2110905B (it)
GR (1) GR77765B (it)
IE (1) IE53672B1 (it)
IT (1) IT1154586B (it)
LU (1) LU84322A1 (it)
NL (1) NL8203010A (it)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3211184C2 (de) * 1981-03-31 1985-12-12 A. Grothe & Söhne KG, 5000 Köln Schaltungsanordnung für ein Freisprechtelefon
DE3301498A1 (de) * 1983-01-14 1984-07-19 Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin Teilnehmersprechstellen-einrichtung fuer fernsprechvermittlungssysteme
DE3509658A1 (de) * 1985-03-18 1986-09-18 Drägerwerk AG, 2400 Lübeck Kommunikationseinheit fuer eine hoer-/sprecheinrichtung
FR2611408B1 (fr) * 1987-02-27 1989-05-26 Radiotechnique Compelec Circuit de commande d e gain d'un amplificateur d'ecoute par haut-parleur pour la suppression de l'effet larsen
WO1990004897A1 (en) * 1988-10-26 1990-05-03 Reptec Hb Telephone plant
DE4012175C2 (de) * 1990-04-14 1995-04-13 Telefunken Microelectron Freisprecheinrichtung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2120558A5 (it) * 1971-01-08 1972-08-18 Brault Andre
SE365375B (it) * 1972-12-18 1974-03-18 Ericsson Telefon Ab L M
DE2439740C3 (de) * 1974-08-19 1978-08-24 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung für sprachgesteuerte Freisprechgeräte mit von den Sprechspannungen abhängigem unterschiedlichen Dämpfungshub je Sprachkanal und je Sprechrichtung
DE2710816C3 (de) * 1977-03-11 1980-01-10 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung für eine Lautfernsprechstation
DE2714132C3 (de) * 1977-03-30 1980-02-07 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung für ein sprachgesteuertes Lautfernsprechgerät

Also Published As

Publication number Publication date
NL8203010A (nl) 1983-07-01
LU84322A1 (de) 1983-02-28
GR77765B (it) 1984-09-25
FR2517911B1 (fr) 1986-04-18
DE3148305A1 (de) 1983-06-09
IE822583L (en) 1983-06-03
IE53672B1 (en) 1989-01-04
IT8224414A0 (it) 1982-11-24
FR2517911A1 (fr) 1983-06-10
GB2110905A (en) 1983-06-22
DK534682A (da) 1983-06-04
DE3148305C2 (it) 1988-02-04
BE894144A (fr) 1982-12-16
IT8224414A1 (it) 1984-05-24
GB2110905B (en) 1985-11-13

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