| 摘要 |
PURPOSE:To realize the frequent alteration of the coding system without increasing the size of the device for the communication among several stations by carrying out the alteration of the coding system via the command response signals of the transmission control procedure. CONSTITUTION:When the data is transmitted to station B from A, transmission procedure control part 2 of station A decides the coding system and then informs it to control part 2 of station B via the command signal. Part 2 of station B informs station A the response signal for confirmation to the command. When the information and confirmation is over for the coding system between stations A and B, control part 2 of both A and B each gives a command to coding/decoding control part 3 of its own to set part 3 to the fixed coded mode. Then control part 2 transmits the data coded at part 3 to station B by the data transmission request given from access method application part 1 of station A. |
