BE877077R - Systemes d'intercommunication a haut-parleur - Google Patents

Systemes d'intercommunication a haut-parleur

Info

Publication number
BE877077R
BE877077R BE2/57881A BE2057881A BE877077R BE 877077 R BE877077 R BE 877077R BE 2/57881 A BE2/57881 A BE 2/57881A BE 2057881 A BE2057881 A BE 2057881A BE 877077 R BE877077 R BE 877077R
Authority
BE
Belgium
Prior art keywords
speaker
intercommunication systems
intercommunication
systems
speaker intercommunication
Prior art date
Application number
BE2/57881A
Other languages
English (en)
French (fr)
Inventor
M Slawik
H Wiedmann
Original Assignee
Int Standard Electric Corp
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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Application granted granted Critical
Publication of BE877077R publication Critical patent/BE877077R/xx

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Function (AREA)
  • Circuit For Audible Band Transducer (AREA)
BE2/57881A 1978-06-19 1979-06-19 Systemes d'intercommunication a haut-parleur BE877077R (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782826671 DE2826671C3 (de) 1978-06-19 1978-06-19 Schaltungsanordnung für einen Fernsprechapparat mit einer Freisprecheinrichtung

Publications (1)

Publication Number Publication Date
BE877077R true BE877077R (fr) 1979-12-19

Family

ID=6042078

Family Applications (1)

Application Number Title Priority Date Filing Date
BE2/57881A BE877077R (fr) 1978-06-19 1979-06-19 Systemes d'intercommunication a haut-parleur

Country Status (3)

Country Link
AT (1) AT373111B (de)
BE (1) BE877077R (de)
DE (1) DE2826671C3 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4536888A (en) * 1981-08-21 1985-08-20 Plantronics, Inc. Voice communication instrument system with line-powered receiver conditioning circuit
US4497980A (en) * 1983-06-16 1985-02-05 Itt Corporation Handsfree circuit for telephone instrument
GB8317706D0 (en) * 1983-06-29 1983-08-03 Standard Telephones Cables Ltd Telephone subsets
DE3407203A1 (de) * 1984-02-28 1985-08-29 Siemens AG, 1000 Berlin und 8000 München Fernsprechstation mit freisprechen
DE3616314A1 (de) * 1986-05-13 1987-11-19 Krone Ag Fernsprechapparat mit freisprecheinrichtung

Also Published As

Publication number Publication date
DE2826671B2 (de) 1980-10-30
AT373111B (de) 1983-12-27
ATA427879A (de) 1983-04-15
DE2826671A1 (de) 1979-12-20
DE2826671C3 (de) 1981-08-06

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