This manual provides basic information on how you can access commonly used PBX functions with proprietary telephones (PTs), single line telephones (SLTs), portable stations (PSs), and DSS Consoles KX-TDA50: PSMPR Software File Version 5.0000 or later, KX-TDA100/KX-TDA200: PMPR Software File Version 5.0000 or later, KX-TDA600: PLMPR Software File Version 5.0000 or later.