Panasonic KX-TD500 - Manual (Page 10)

Configuration
10 Programming Guide
Parameter Status
Default —
Value Range 1. INS
2. OUS
3. FAULT
Description/Function Used to set the status of the service cards.
1. INS (In-Service):
The target service card is operating normally.
2. OUS (Out-of-Service):
Programming data for the target service card is entered, but the
target service card is not assigned to the system.
3. FAULT:
The target service card is defective (hardware). In this case, the
LED indicator on the service card is lit.
Reference None