说明：  LAPS协议：系统启动后，LAPS协议处理器发送端处于空闲状态，此时它可以向理想信元发送数据允许信号TENB。理想信源收到TENB有效信号，就开始发送数据，它发送的是长度在4－1544字节之间变化的数据包，在数据包的第一字节发送同时，送出数据包开始指示TSOP，在数据包的最后一个字节，发送数据包结束指示TEOP。在数据包的发送过程中，LAPS协议处理器可以随时通过TENB通知理想信源暂停数据发送，直到TENB有效，再继续发送。
(LAPS protocol: the system starts, LAPS protocol processor, the transmitter is idle, then it can send data to the ideal cell to allow signal TENB. Ideal signal source receive TENB effective, they begin to send data, it sends the changes in length between 4-1544 bytes of data packets, the first byte in the packet sent at the same time, start sending data packets directed TSOP, In the last byte of the packet, send packet end instruction TEOP. In the process of sending packets, LAPS protocol processor can notice at any time by TENB the ideal source suspend sending data until TENB be effective, then continue to send.)