BE894144A - Montage pour un interphone ou telephone "mains libres" - Google Patents

Montage pour un interphone ou telephone "mains libres"

Info

Publication number
BE894144A
BE894144A BE0/208839A BE208839A BE894144A BE 894144 A BE894144 A BE 894144A BE 0/208839 A BE0/208839 A BE 0/208839A BE 208839 A BE208839 A BE 208839A BE 894144 A BE894144 A BE 894144A
Authority
BE
Belgium
Prior art keywords
intercom
hands
telephone
free
assembly
Prior art date
Application number
BE0/208839A
Other languages
English (en)
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 BE894144A publication Critical patent/BE894144A/fr

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)
  • Telephone Set Structure (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
BE0/208839A 1981-12-03 1982-08-19 Montage pour un interphone ou telephone "mains libres" BE894144A (fr)

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 (1)

Publication Number Publication Date
BE894144A true BE894144A (fr) 1982-12-16

Family

ID=6148050

Family Applications (1)

Application Number Title Priority Date Filing Date
BE0/208839A BE894144A (fr) 1981-12-03 1982-08-19 Montage pour un interphone ou telephone "mains libres"

Country Status (10)

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

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 (fr) * 1988-10-26 1990-05-03 Reptec Hb Installation telephonique
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 (fr) * 1971-01-08 1972-08-18 Brault Andre
SE365375B (fr) * 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
FR2517911B1 (fr) 1986-04-18
GR77765B (fr) 1984-09-25
DE3148305A1 (de) 1983-06-09
IT8224414A1 (it) 1984-05-24
IE822583L (en) 1983-06-03
DK534682A (da) 1983-06-04
NL8203010A (nl) 1983-07-01
FR2517911A1 (fr) 1983-06-10
IE53672B1 (en) 1989-01-04
IT8224414A0 (it) 1982-11-24
IT1154586B (it) 1987-01-21
GB2110905A (en) 1983-06-22
GB2110905B (en) 1985-11-13
DE3148305C2 (fr) 1988-02-04
LU84322A1 (de) 1983-02-28

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: DEUTSCHE TELEPHONWERKE UND KABELINDUSTRIE A.G.

Effective date: 19890831