Transmitting at night is most effective for long distance communication but the skip zone becomes significantly larger.

Soon after, it provided a reliable form of long distance communication.

Since I have described something that looks like it can enable long distance communication, lets deal with that as well.

Videophones and similar video technologies can be used for distance communication using sign language.

The telegraph became the main form of long distance communication throughout the world until the 1960s.

Technical advances and the increasing demand for long distance communication meant but one thing; lower prices.

It refers to the circular segment of earth profile which blocks off long distance communications.

Now, the telephone and e-mail are the most common means of distance communication.

Complex networks are only needed for longer distance communications.

"Ah, like some primitive groups who wished to make long distance communications," said the ship.