Xerox DocuColor 2240 Service Manual page 437

20-510 DTMF Protocol Error
Command rejection signal is received and communication is stopped.
Procedure
Switch power off then on.
Re-try the Fax job
Status Indicator RAPs
20-510, 20-511
20-511 No File Transfer Ability at Destination
File transfer function is not available at remote terminal.
Procedure
Switch power off then on.
Re-try the Fax job
09/03
2-404
Initial issue
DC 3535/2240/1632, WC M24