Callinon VII was the seventh planet in the Callinon system. This system was located inside Dominion space. It was the site of an unmanned subspace relay station, where the Karemma were instructed to direct all inquiries.
During their search for the Founders in 2371, Jadzia Dax and Miles O'Brien transported to the station from the USS Defiant. They were trapped on the planet's surface when a shield was raised around the station, and the Defiant was forced to leave them behind when Jem'Hadar forces appeared in the system. (DS9: "The Search, Part I")