JPS6444655A - Data communication system - Google Patents
Data communication systemInfo
- Publication number
- JPS6444655A JPS6444655A JP62202083A JP20208387A JPS6444655A JP S6444655 A JPS6444655 A JP S6444655A JP 62202083 A JP62202083 A JP 62202083A JP 20208387 A JP20208387 A JP 20208387A JP S6444655 A JPS6444655 A JP S6444655A
- Authority
- JP
- Japan
- Prior art keywords
- data
- signal
- response signal
- outputted
- comparators
- 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
- 230000005540 biological transmission Effects 0.000 abstract 3
- 238000001514 detection method Methods 0.000 abstract 2
Landscapes
- Detection And Prevention Of Errors In Transmission (AREA)
- Bidirectional Digital Transmission (AREA)
- Communication Control (AREA)
Abstract
PURPOSE:To improve the data transmission efficiency by dividing data to be transmitted into blocks, inserting dummy data between block data to transmit data and transmitting a response signal from a data reception-side terminal equipment during transmission of dummy data. CONSTITUTION:Though a data signal VA' in the low level leaked to the four- wire reception side is outputted during data transmission, outputs of comparators 15a and 15b go to the low level and the detection signal of a response signal VB is not outputted if a reference voltage VS is set to a high value. Meanwhile, when the response signal VS is received, the level of the signal passing band-pass filters 13a and 13b is considerably raised and the detection signal of the response signal VB is outputted. The reference voltage VS of comparators 15a and 15b is properly set to eliminate a need of a signal processing circuit like an echo canceller which is used to prevent leak in a hybrid circuit 12, and the circuit constitution is simplified.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62202083A JPS6444655A (en) | 1987-08-13 | 1987-08-13 | Data communication system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62202083A JPS6444655A (en) | 1987-08-13 | 1987-08-13 | Data communication system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6444655A true JPS6444655A (en) | 1989-02-17 |
Family
ID=16451681
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62202083A Pending JPS6444655A (en) | 1987-08-13 | 1987-08-13 | Data communication system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6444655A (en) |
-
1987
- 1987-08-13 JP JP62202083A patent/JPS6444655A/en active Pending
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