Another one provides a communications link and the third is to provide ventilation.

另外一个钻孔用来提供通讯连接，第三个用以通风。

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A communications link is established over the first air interface between the mobile station and the first base station.

在移动站和第一基站之间的第一空中接口上建立通信链路。

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The TCDL is a Ku-band digital data link that delivers wide-bandwidth communications using common data link, or CDL, waveform standards.

TCDL是一个Ku波段数字数据链，可提供采用通用数据链波形标准的宽带通信。

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Owen Garriott says back then NASA would set up a communications link so that the astronauts could talk with their families while whizzing around the planet.

NPR: Millionaire Follows Dad's Footsteps �� Into Space

If this will suffice, then no problem, but even RIM admits that consumer focus is changing and tending toward a second communications link via 3G or 4G as a stand-alone device.

FORBES: The RIM Playbook: An "Evolving Concept"

As it stands, Bluetooth is just a dumb communications link.

ECONOMIST: REPORT: WIRELESS COMMUNICATIONS