The Kaleb sector was a region of space. This sector was largely deserted. The closest Starfleet facility, on Draken IV, was in the Taugan sector which was two days away at maximum warp in Federation space.
In 2369, the Kaleb sector was where the IRW Khazara was to transfer some cargo containers to a Corvallen freighter in 2369, which would then rendezvous with the USS Enterprise-D a short time later to take the cargo to Starfleet Headquarters. The cargo contained Vice-Proconsul M'ret and his aides in stasis, members of the Romulan underground movement, who were defecting to the Federation. (TNG: "Face of the Enemy")