这通常用于检测网络故障(电缆、交换机、路由器，等等)，其中进程仍然运行但它们之间的通信失败。
This is typically used to detect network failures (cable, switch, router, and so on) where the processes stay running but the communication between them fails.
现在在长岛运行的第一代电缆十分昂贵，因为它们都镀上了一层银。
The first-generation cables, now operating successfully on Long Island, are costly, mainly because the wires are coated with silver.
低阻抗平衡输出，让即使长电缆抗干扰性能运行。
Low impedance and balanced output allow interference free performance even with long cable runs.
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