Panasonic KX-TD500 System Reference Manual page 1435

3.14 Device not connect for SMDR
Error Code
Possible cause of
the malfunction
Countermeasures
Note
0 B 0 0
1) RS-232C cable is not connected.
2) RS-232C cable is defective.
3) Printer is turned off. (including out of paper)
Do you use SMDR?
Yes
Check above item 1), 2), 3)
No Problem
Replace the CPU card*
* It is recommended to have a current copy of the program on disk or tape to
facilitate accurate and rapid recovery.
15-E-17
Assign SMDR to "No" in the
system programming
End
No
NG