Eight Keys to Eden by Mark Clifton — Read

One minute after the regular report call from the planet Eden was overdue, the communications operator summoned his supervisor. His finger hesitated over the key reluctantly, then he gritted his teeth and pressed it down. The supervisor came boiling out of his cubicle, half-running down the long aisle between the forty operators hunched over their panels.

"What is it? What is it?" he quarreled, even before he came to a stop.