This manual is designed for users of Digital Super Hybrid Systems, model numbers, KX-TD308. It is to be used after the system is installed and System Programming is completed. The focus is Digital Proprietary Telephones KX-T7420/KX-T7425/KX-T7431, KX-T7433/ KX-T7436/KX-T7220/KX-T7230/KX-T7235/KX-T7250, Standard Telephones and their features.