Slaybis was a star system located in the galaxy's Alpha Quadrant, in the space of the Demilitarized Zone between the Federation and Cardassian Union.
History and specifics
Slaybis was the location of a number of planets. Second planet Slaybis II was the site of a Cardassian colony, while fourth planet Slaybis IV hosted a Human settlement. (VOY - The Brave and the Bold, Book Two novella: The Third Artifact)