Panasonic KX-TD500 System Reference Manual page 1447

3.26 OPX power down
Error Code
Possible cause of
the malfunction
Countermeasures
Note
60 xx
xx= 01 to 40 : Slot number
1) Power-off of external OPX Power Unit or bell.
2) Defective OPX card.
Check the port status of the related
OPX card
Faulty port
Check external OPX Power Unit
(Power, Power cable, Connector
etc.).
Check the port status of the related
OPX card
No change in
condition
Replace the OPX card.
Power on the external OPX Power
Unit and then, enter INS command
from the maintenance terminal
None
15-E-29
INS status
End
No "Fault" port