JPS5625866A - Transmission system of communication signal - Google Patents
Transmission system of communication signalInfo
- Publication number
- JPS5625866A JPS5625866A JP10120579A JP10120579A JPS5625866A JP S5625866 A JPS5625866 A JP S5625866A JP 10120579 A JP10120579 A JP 10120579A JP 10120579 A JP10120579 A JP 10120579A JP S5625866 A JPS5625866 A JP S5625866A
- Authority
- JP
- Japan
- Prior art keywords
- audio
- output
- section
- signal
- sinusoidal wave
- 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
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
- H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
Abstract
PURPOSE:To enable to transmit the audio and information signal on the same telephone line as the signal at the audio and nonaudio section, by inserting the sinusoidal wave having higher frequency in the audio frequency band of a given value of level or more at the start and end of the section not in existing of audio of the telephone line. CONSTITUTION:The output audio A from the output terminal 1 of the telephone set is input to the audio switch circuit 2, and the audio A is output to the output terminal 3 as it is at the audio section. When the circuit 2 detects the end of the audio A, the information is fed to the sinusoidal wave oscillator 4 and the sinusoidal wave B having higher frequency of a given level is output to the output terminal 3 as the signal indicating the end of audio section. Further, a certain information signal C is input from the input terminal 5 and stored temporarily in the input buffer memory 6, and modulated into the band other than the frequency band where the sinusoidal wave B exists at the modulator 7, and this modulated signal D is output to the output terminal 3 until the circuit 2 detects the beginning end of the next audio section. Further, audio A and information signal C are fed to the transmission line 8 and the audio A and the information signal C are separated at the selection signal detector 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10120579A JPS5625866A (en) | 1979-08-10 | 1979-08-10 | Transmission system of communication signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10120579A JPS5625866A (en) | 1979-08-10 | 1979-08-10 | Transmission system of communication signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5625866A true JPS5625866A (en) | 1981-03-12 |
Family
ID=14294418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10120579A Pending JPS5625866A (en) | 1979-08-10 | 1979-08-10 | Transmission system of communication signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5625866A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114449430A (en) * | 2021-12-28 | 2022-05-06 | 芯讯通无线科技（上海）有限公司 | Test circuit and method for audio module |
-
1979
- 1979-08-10 JP JP10120579A patent/JPS5625866A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114449430A (en) * | 2021-12-28 | 2022-05-06 | 芯讯通无线科技（上海）有限公司 | Test circuit and method for audio module |
| CN114449430B (en) * | 2021-12-28 | 2024-02-02 | 芯讯通无线科技（上海）有限公司 | Test circuit and method for audio module |
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