Panasonic DP-C321 Service Handbook page 173

020-506 No Ability at Destination
[Detection Conditions] The recipient machine does not
have the remote sort copy function.
[Actions] Perform the operation again.
020-507 Password Check Error
[Detection Conditions]
Password Check Error. Mailbox Number Error. No
polling reserved documents are found.
[Actions] Perform the operation again.
020-510 DTMF Protocol Error
[Detection Conditions] The system stopped
communication after receiving the command reject
command.
[Actions] Perform the operation again.
020-511 No File Transfer Ability at Destination
[Detection Conditions] The recipient machine does not
have the file transfer function.
[Actions] Perform the operation again.
020-512 Detect Endless Loop During Remote Repaly
Broadcast
[Detection Conditions] An infinite loop was detected at
the remote relay broadcast.
[Actions] Perform the operation again.
020-513 Illegal Command on TRESS
[Detection Conditions]
The system received illegal command from the
sending machine at the remote maintenance.
[Actions] Perform the operation again.
3-99
020-514 Requested Invalid Function on TRESS
[Detection Conditions]
The system received the remote maintenance request
from the sending machine but does not have the
function for it.
[Actions] Perform the operation again.
020-515 Receive Illegal Command
[Detection Conditions]
DIS was received from the calling station. DCS was
received though the machine does not have the
capability. An illegal command was received.
[Actions] Perform the operation again.
Chapter 3 Troubleshooting