JPS544003A - Mutual communication unit of loud type - Google Patents
Mutual communication unit of loud typeInfo
- Publication number
- JPS544003A JPS544003A JP6931377A JP6931377A JPS544003A JP S544003 A JPS544003 A JP S544003A JP 6931377 A JP6931377 A JP 6931377A JP 6931377 A JP6931377 A JP 6931377A JP S544003 A JPS544003 A JP S544003A
- Authority
- JP
- Japan
- Prior art keywords
- communication unit
- mutual communication
- loud
- type
- loud type
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
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)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Abstract
PURPOSE:To make easy the interruption from the receiver, by attenuating the gain of the transmitter amplifiing circuit, through obtaining rectifying output only from normal noise and through discriminating the normal noise from the audio with a rectifying circuit connected to the transmitter amplifying circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6931377A JPS544003A (en) | 1977-06-10 | 1977-06-10 | Mutual communication unit of loud type |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6931377A JPS544003A (en) | 1977-06-10 | 1977-06-10 | Mutual communication unit of loud type |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS544003A true JPS544003A (en) | 1979-01-12 |
Family
ID=13398936
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6931377A Pending JPS544003A (en) | 1977-06-10 | 1977-06-10 | Mutual communication unit of loud type |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS544003A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50124508A (en) * | 1973-03-12 | 1975-09-30 | ||
JPS5154703A (en) * | 1974-11-08 | 1976-05-14 | Oki Electric Ind Co Ltd |
-
1977
- 1977-06-10 JP JP6931377A patent/JPS544003A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50124508A (en) * | 1973-03-12 | 1975-09-30 | ||
JPS5154703A (en) * | 1974-11-08 | 1976-05-14 | Oki Electric Ind Co Ltd |
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