A null modem cable connected between the serial ports of the two systems is used to transmit heartbeats between the two nodes.

两个系统的串口之间的直连线缆用来在两个节点间传输heartbeat。

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Beyond that, the whole quick-disconnect section feels abnormally large with a cable connected.

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In the USB IF exhibit area at the CES I saw a high definition display that only had a USB cable connected to it that provided power for the display as well as a channel for the video traffic.

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Designed for easy setup and use, PLAYBAR connects to the TV with a single optical cable, playing everything that is connected to it, including cable boxes, Blu-ray players and game consoles.

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