It was his personal encryption, which allowed the outgoing signals to come back on line.

The second line is our outgoing signal.

The outgoing signal to Earth was still operating, carrying complete details of everything that happened.

For security reasons, the interior of the Ligon corporate center was shielded against both incoming and outgoing signals.

"We're totally blacked out so far as incoming or outgoing signals is concerned," he said.

"How about if we pull out a short distance," said Hutch, "and see whether we can hear an outgoing signal?"

If necessary, anyone down on the surface could use the same wavelengths to send an outgoing signal.

Seconds later the oscilloscope registered the wave pattern of the outgoing signal.

Asquiol said, careful to adjust his outgoing signal to the frequency involved: 'Who are you?

Local telephone lines use the same wires to send and receive, which results in a small amount of the outgoing signal being reflected back.