I'm not even getting a signal received indication.

On January 10, 1946, this was successful, with the reflected signal received 2.5 seconds after it was transmitted.

The system doesn't "turn on" until it receives a signal that the light is red.

The side sites relay the signals received to the central site over a point-to-point microwave link.

If indeed the signal received was a message, it came from a very distant source.

Phones labeled as wireless usually use digital signals to send and receive calls.

Deiphobus glances at one of his captains, receives some subtle signal.

The signal is received by a network of enormous antennas about four hours later, the time it takes light to travel from Neptune.

Phoenix's main role is to question signals and communications received and solve them.

Since the other drive received no signal, it defaults to slave mode.