When the line is available the transmitter ensures that a minimum inter packet gap of at least 96 bits prior to transmitting a 56-bit preamble and an 8-bit Start of Frame Delimiter(SFD) ahead of the frame
当该线路可用时,该发射器确保一个至少96比特的最小包间隔在一个56比特的报头前优先发送,并有一个8比特的帧起始定界符（SFD）在该框架之前.