The three existing copper cables, along with satellites, can carry a total of 20,000 calls.

All of the cases have one thing in common: the thieves were after copper cable.

The phone companies, stuck with the 19th-century technology of copper cable, looked to be at a disadvantage until recently.

Even the newest copper cable, laid in 1983, has a maximum capacity of only 9,000 calls.

If his end touches the ground, it will contact a thick copper cable.

In 1964, a comparable call cost about $6.34 on the first copper cable across the Pacific.

Thus, an optical fiber or a copper cable is a transmission medium.

To him this was proof that one day information and electricity would be sent across the skies instead of through copper cable.

From the coils, two heavy copper cables ran, twisted, off to the main power board on the other side of the room.

A single strand can carry more information than a copper cable the thickness of an arm.