Martin sketched a diagram to show how my home phone's copper wire has to go through various telephone-system way stations before it reaches the kind of fiber-optic cable his crew was installing.

However, it’s also the slowest, since the speed at which data can travel over DSL is limited by electrical resistance in the copper phone ... exchange using fiber optic cables alone—can ...

DSL (that's "digital subscriber line") is a fixed connection most popular in areas without access to cable or fiber internet. With DSL, your connection to the internet runs through copper phone lines.

The migration involved the replacement of copper cables with fiber in at least 60 provinces nationwide. "This transformation will enable us to better serve the growing digital needs of our ...

AT&T reported another strong quarter for its fiber ... copper network, which was something that Stankey touched on this week. “Within the next few weeks, we will make detailed filings with the FCC to ...