SE9101260L - Telephone plant for telephone conferences - has microphone and loudspeaker separated from base unit and connected by separate wires - Google Patents

Telephone plant for telephone conferences - has microphone and loudspeaker separated from base unit and connected by separate wires

Info

Publication number
SE9101260L
SE9101260L SE9101260A SE9101260A SE9101260L SE 9101260 L SE9101260 L SE 9101260L SE 9101260 A SE9101260 A SE 9101260A SE 9101260 A SE9101260 A SE 9101260A SE 9101260 L SE9101260 L SE 9101260L
Authority
SE
Sweden
Prior art keywords
microphone
base unit
telephone
loudspeaker
plant
Prior art date
Application number
SE9101260A
Other languages
Swedish (sv)
Other versions
SE9101260D0 (en
Inventor
P Renkel
Original Assignee
Reptec Handelsbolag
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
Priority claimed from PCT/SE1988/000567 external-priority patent/WO1990004897A1/en
Application filed by Reptec Handelsbolag filed Critical Reptec Handelsbolag
Priority to SE9101260A priority Critical patent/SE9101260D0/en
Publication of SE9101260L publication Critical patent/SE9101260L/en
Publication of SE9101260D0 publication Critical patent/SE9101260D0/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

Abstract

The plant consists of a telephone set, a base unit, a loudspeaker and a microphone. The microphone (7) and the loudspeaker/loudspeakers (8) are separated from the base unit (4) and connected to it by means of separate wires (9,10). The base unit (4) consists of three main parts. An amplifier for the loudspeaker/loudspeakers, an amplifier and voltage feed for the microphone, and a balancing circuit comprising two transformers in which all input signals of the plant are connected and outbalanced. The plant provides a good two-way directed speech communication in small and medium size conference rooms via the telephone set without an annoying speech alternation as a limiting factor.
SE9101260A 1988-10-26 1991-04-25 TELEFONANLAEGGNING SE9101260D0 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE9101260A SE9101260D0 (en) 1988-10-26 1991-04-25 TELEFONANLAEGGNING

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/SE1988/000567 WO1990004897A1 (en) 1988-10-26 1988-10-26 Telephone plant
SE9101260A SE9101260D0 (en) 1988-10-26 1991-04-25 TELEFONANLAEGGNING

Publications (2)

Publication Number Publication Date
SE9101260L true SE9101260L (en) 1991-04-25
SE9101260D0 SE9101260D0 (en) 1991-04-25

Family

ID=20382569

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9101260A SE9101260D0 (en) 1988-10-26 1991-04-25 TELEFONANLAEGGNING

Country Status (1)

Country Link
SE (1) SE9101260D0 (en)

Also Published As

Publication number Publication date
SE9101260D0 (en) 1991-04-25

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