Panasonic KX-TD500 Installation Manual page 259

5.2 Diagnosis
System Diagnosis program is used to test the system hardwares and pinpoint the
problems caused by hardware defects.
System Diagnosis program is classified into the following three types:
• Card / Port Test (Section 5.2.1)
• CPU Test (Section 5.2.2)
• TSW Test (Section 5.2.3)
Diagnosis-Card Information screen
Utility 5-3