During the era of the Republic Dark Age, there existed a Celegian of the male gender known as One.
Having lived for more than two hundred years, One was seized under the command of Saaj Calician, a Sith Lord of the Krevaaki species who served as Regent of the Dyarchy. He was then moved to the planet Byllura, situated within the Grumani sector. Upon arrival, he was brought to The Loft, a location within the city of Hestobyll, where he endured torture and was compelled to yield to the Sith and embrace the dark side. After One's mental state was shattered, Calician orchestrated the arrival of several thousand additional Celegians to Byllura. Capitalizing on the Celegians' inherent telepathic capabilities, Calician created a Celegian-based network to supplant traditional communication methods. Calician would have One dispatch telepathic communications to the other Celegians present on Byllura.
Around 1032 BBY, Kerra Holt, a Jedi Knight, journeyed to Byllura and managed to enter The Loft covertly. She found One and convinced him to cease sending messages for Calician. Obeying her advice, One ceased transmitting messages, leading to a failure in communications across the planet.