Panasonic KX-TD500 Installation Manual page 256

Echo back error
Error Code 1300 wxx
w = 1 to 3 : Shelf number
xx = 01 to 14 : Slot number
Possible cause of 1.
the malfunction
2.
Countermeasures
OK
Note *It is recommended to have a current copy of the program on disk to facilitate
accurate and rapid recovery.
Troubleshooting
Defective FIFO (First In First Out) trouble with a card.
Input/Output trouble (CPU card, Shelf).
Check the status of the
associated card.
Enter card test command from the
maintenance terminal.
Faulty
Replace the faulty LPR card.
Enter card test command from the
maintenance terminal.
Faulty
Replace the CPU card*.
Enter card test command from the
maintenance terminal.
Faulty
Replace the Shelf.
End
Faulty
OK
OK
OK
Enter INS (In-Service) command
from the maintenance terminal.
5.2 Troubleshooting Guide
257