CENTREX® (CTX) SERVICE

A service offered by Bell Operating Companies that provides functions and features comparable to those provided by a PBX or a PABX. Note: "Centrex &reg C.O." indicates that all equipment except the attendant's position and station equipment is located in the central office . "Centrex &reg C.U." indicates that all equipment, including the dial switching equipment , is located on the customer's premises.