Starfleet Academy Courses. Subspace communication: Subspace communication, subspace radio, or hyperchannel, is the primary form of electromagnetic communication used throughout the Federation. By transmission of a subspace radio signal, which travels through subspace rather than normal space, subspace communication permit the sending of data and messages across interstellar distances faster than the speed of light. Consult: TNG: "The Ensigns of Command"; VOY: "The 37's", etc. Star Trek Starfleet

Starfleet Academy Courses. Subspace Communication: Subspace communications have a varying degree of band frequencies, from upper (or high-band) to lower. For example, a diplomatic frequency used by the Vulcans is on a lower subspace band. Consult: ENT: "Fallen Hero", "Dead Stop"; TNG: "Ensign Ro". Star Trek Starfleet Command | Starfleet Academy