RWBY World of Remnant Season 2 Episode 3 Cross Continental Transmit System Episode Title:Cross Continental Transmit System.Episode Description:Ozpin details the history of the Cross Continental Transmit System (CCTS), before which kingdoms could only communicate within their borders by radio or across borders with physical messages, the latter of which were always endangered by Grimm. Establishing relay satellites was impractical because spaceflight was impossible, as known Dust types lose their powers outside Remnant's atmosphere, so Atlas instead developed a series of four tower-housed wireless-signal hubs - one in each kingdom. While allowing an online web and communication accessible via handheld "scrolls", connectivity suffers the further one is from a kingdom, with attempts at smaller support towers suffering from Grimm attacks. Despite the benefits of global communication, Ozpin notes the system's fatal flaw is that losing even one of the towers will take down the entire network, describing it a poetic irony that Remnant's people must either speak as one or not speak at all.