通过发出这条命令，在源系统启动发送器通道。
Start the sender channel at the source by issuing this command.
通过发出这条命令，在目标系统启动发送器通道
Start the sender channel at the target by issuing this command
由发送器所送出的停止位总是被设置成信号电平。
Stop bit send by transmitters are always placed in the mark level.
该系统包括一对设备——光学数据发送器和接收器。
The system consists of a device pair - optical data sender and receiver.
该系统包括一对设备——光学数据发送器和接收器。
The system consists of a device pair - optical data sender and receiver.
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