Fiber optics communications networks can carry digital signals, thus increasing communications speed and capacity.

光纤通信网络携带的是数字信号，因此提高了通信速度和容量。

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The limited transmission rate available on the Public switched telephone network (PSTN) and on wireless networks presents a significant challenge to digital video communications.

这些应用对传输速率有限的公共交换电话网(PSTN网)和无线网络提出了重大挑战。

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Barry Cheetham, senior lecturer in The School of Computer Science at the University of Manchester, is combining his academic expertise in communications, networks and digital signal processing with his love of choral singing.

CNN: Musicians aim to create virtual choir

This is yet another big step in advancing digital communications in the UK. We're offering one of the fastest mobile networks in the world, and are pioneering how to make superfast broadband available to homes and businesses that currently have little or no connectivity.

ENGADGET: EE brings its 4G to Cumbria, rural home of the signal blackspot