This manual is designed for users of Digital Super Hybrid System KX-TD816 and KX-TD1232. It is to be used after the system is installed and System Programming is completed. The focus is Digital Proprietary Telephones: KX-T7220/KX-T7230/KX-T7235/KX-T7250/KX-T7420/T7425/KX-T7431/KX-T7433/KX-T7436, Digital DSS Consoles KX-T7240/KX-T7440/KX-T7441, Single Line Telephones and their features.Â