| 摘要 |
PURPOSE:To improve the operating efficiency by classifying bidirectional communicating processing data and unidirectional communicating processing data, sending alternately and continuously from the center equipment to the terminal equipment and decreasing the access time of the polling system. CONSTITUTION:The output of system 32-34 to execute various types of the service of CATV is sent through interfaces 32a-34a to a CPU 35 and the sending sequence is controlled. The sending sequence is classified into bidirectional communicating processing data and unidirectional communicating processing data, and both are alternately continuously transmitted. A transmitting signal is outputted 39 through an interface 36 and a modulating device 37 to a distributing mixer 38. The necessary processing is executed for the bidirectional communicating processing data at the receiving terminal shown outside the figure, the data to be responded are returned, inputted to the distributing mixer 38, demodulated 40 and inputted through an interface 41 to the CPU 35. The CPU 35 judges and controls the response data and supplies the data to the systems 32-34. Thus, the access time is shortened and the operating efficiency is improved. |
