Kalandra system

The Kalandra System boosts eleven planets, two asteroid fields, and a massive Federation Subspace communications array. None of the planets are inhabitable, although Outpost R-58 resides on a moon called Magi orbiting Kalandra VII. The outpost conducted scientific research, did maintenance on the array, and acted as a refueling station. Starfleet regularly conducted wargames and other fleet exercises there.

In 2375, during the Dominion War, the Federation Alliance was entrenched in the system and could move no further. In that year, Captain Benjamin Sisko and General Martok expressed their concerns that the ionic storms in the Kalandra system would expose the starships there to the Dominion, necessitating the need to expand the lines beyond it. (DS9: "The Emperor's New Cloak")