电报线路提供了类似的经济挑战——很高的启动资本和很低的边际运营成本。

Telegraph lines presented a similar economic challenge-high start-up capital and low marginal operating costs.

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您首先要启动控制台终端 (TTP) 并将可编程异步线路控制器 (PAS) 和磁带控制器 (MT) 结合在一起以避免设备号冲突。

You first enable the console terminal (TTP) and associate the programmable asynchronous line controller (PAS) and magnetic tape controller (MT) to avoid device number conflicts.

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无法启动与桌面计算机的通讯。通讯端口上未发现载体。请检查通讯线路是否连通并处于活动状态。

Cannot start communications with the desktop computer. No carrier was detected on the communications port. Please verify that the communications line is connected and active.

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