通讯的物理介质为双绞线，通讯波特率为250kbps，采用CAN2.0B支持扩展帧，intel格式，TCU无需自带120欧姆终端电阻，通讯网络基于SAEJ1939协议。(The physical medium of communication is twisted pair, the communication baud rate is 250kbps, CAN2.0B supports extended frame, Intel format, TCU does not need 120 ohmic terminal resistance, and communication network is based on SAEJ1939 protocol.)