上位机、下位机之间通过RS232C串行通讯接口总线交换数据。
The communication between host computer and slave computers is accomplished through their serial ports, RS232C.
就像之前描述的，消息的消费者和生产者并不直接交换消息；他们从总线上发送和接收消息。
As described earlier, message consumers and producers do not exchange messages directly; they send and receive messages from the bus.
服务集成总线可以配置为连接到其他消息传递网络，并与其交换消息。
A service integration bus can be configured to connect to, and exchange messages with, other messaging networks.
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