Beta Kupsic was a star system known to the Bajorans in the 24th century, located in or near Federation space in a location proximate to Starbase Montgomery.
The USS Enterprise-D traveled to Beta Kupsic after leaving Starbase Montgomery in 2365. (TNG episode: "The Icarus Factor")
In 2371, Gwyn was attacked by the L'Waht group T'Dria at Beta Kupsic. (DS9 comic: "Rules of Behavior")
Circa 2372, Istani Reyla traveled to Beta Kupsic to participate in an archaeological dig on an orbiting planetary body. (DS9 novel: Avatar, Book One)