This manual is designed for users of an Advanced Hybrid System, model number KX-TA624. It is to be used after the system is installed and System Programming is completed. The focus is Proprietary Telephones (PTs); KX-T7020/KX-T7030/KX-T7130/ KX-T7135/KX-T7050/KX-T7055, Single Line Telephones (SLTs) and their features. The step-by-step procedures required to activate each feature are explained in detail.