The light flashes in specific patterns. A fast flash generally signifies a "dot" or the number one, while longer, more sustained flashes represent "dashes".
In network diagnostics, you run a UDP listener. Packets should arrive every 500ms. Suddenly, they stop. The tcpdump shows nothing. Your brain begins pattern-matching the intermittent silence as if it were Morse code: Long pause. Short pause. Long pause. You convince yourself the network is trying to tell you something. nullxiety morse code upd