After examining the controls and making a few experiments, Jason began to understand the operation. Though all stations were on the screen at all times, their audio channels could be controlled. In that way two, three or more stations could be hooked together in a link-up. They would be in round-robin communication with each other, yet never out of contact with the other stations.
Identification between voice and sound was automatic. Whenever one of the pictured images spoke, the image would glow red. By trial and error Jason brought in the audio for the stations he wanted and tried to follow the course of the attack.
Very quickly he realized this was something out of the ordinary. In some way, no one made it clear, a section of the perimeter had been broken through and emergency defense
