Starfleet Academy Courses. Subspace Communication: Ship commanders also use subspace communication to transmit reports on their various missions to Starfleet Command, solicit suggestions, make requests, monitor the status of other ships, and issue other commands. See: ENT: "Shockwave"; TOS: "Balance of Terror"; Star Trek II: The Wrath of Khan; TNG: "The Best of Both Worlds"; VOY: "Friendship One"; etc. Star Trek Starfleet Command | Starfleet Academy

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