SE9101260D0 - TELEFONANLAEGGNING - Google Patents
TELEFONANLAEGGNINGInfo
- Publication number
- SE9101260D0 SE9101260D0 SE9101260A SE9101260A SE9101260D0 SE 9101260 D0 SE9101260 D0 SE 9101260D0 SE 9101260 A SE9101260 A SE 9101260A SE 9101260 A SE9101260 A SE 9101260A SE 9101260 D0 SE9101260 D0 SE 9101260D0
- Authority
- SE
- Sweden
- Prior art keywords
- loudspeaker
- microphone
- base unit
- plant
- loudspeakers
- Prior art date
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.
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 SE9101260L (en) | 1991-04-25 |
SE9101260D0 true 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) |
-
1991
- 1991-04-25 SE SE9101260A patent/SE9101260D0/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
SE9101260L (en) | 1991-04-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NAV | Patent application has lapsed |
Ref document number: 9101260-9 |