eWeek, The 100-Million-Mile Network: "Listening anxiously for any sign of life were navigators at the Jet Propulsion Laboratory (JPL) in Pasadena, Calif. They had to fix a broken interplanetary communications link that reached more than 100 million miles (and counting - the distance keeps growing as the orbits of Earth and Mars draw apart)... Diagnosing what was wrong with Spirit depended on interpreting squawks, tones and other sounds traveling along a conduit dubbed the Deep Space Network."
[via /.]