Nodus Secundus was a human built computer capable of sending brodcasts.
LV-1201
the Ancient Predator used a signal emiting f4v. booster imaging which sends Prince in Aliens versus Predator 2.
Aliens versus Predator 2
Andrew Harrison used this signal to disimpound the electonics right before Dunya killed him with a headshot. The Ancient was killed by the Predalien right after sending the signal and the Predalien was killed by Prince or Harrison.