In recent years, networks of fiber-optic cable have been replacing electrical wire for transmitting telecommunications signals.

近年来，光纤网络已经取代了传输电信信号的电线。

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This produces a "waveguide," which functions like a one-atom-thick fiber optic cable.

这就形成了一个“波导管”，就像一个单原子厚度的光纤电缆。

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Even for those unable to watch or listen on the Internet, satellite dishes and fibre-optic cable are hugely expanding the choice of programmes.

即使对那些无法在网上收看、收听新闻广播的人来说，卫星天线和光纤电缆大大也拓宽了各种节目的可选择性。

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Fiber optic cable is not vulnerable to EMP, but the switches and controls that use microelectronics in conjunction with the fiber optic cable need to be protected.

CENTERFORSECURITYPOLICY: Old threat with a new face

Fiber optic cable is not vulnerable to EMP, but the switches and controls that use microelectronics in conjunction with the fiber optic cable are, and should be protected.

CENTERFORSECURITYPOLICY: Center For Security Policy

Continuing efforts to replace copper communications cable with fiber optic cable will significantly reduce overall EMP vulnerability.

CENTERFORSECURITYPOLICY: Old threat with a new face