| 摘要 |
The message to be transmitted consists of one or more transmission words which each consist of, in the sequence of transmission, a start section, a data word of a certain number of bits and a stop section. At rest, the link is in a first state. During transmission of the start section, the link is set to a second state, and during transmission of the stop section the transmission is set to the first state. For each bit of the data word, the link is set, depending on the logical level of the bit, to the first state or the second state. Each station monitors the state of the link and refrains from transmission if the station detects an occupied state as a result of a transmission by another station of the link. <IMAGE> |
