Xerox DocuColor 2240 Service Manual page 527

83-722 Frame Length Error
Frame length has exceeded 3.45 sec. (300bps command / response)
Procedure
Remote terminal failure. Re-try the Fax job
Status Indicator RAPs
83-722, 83-723
83-723 CD Time-out
CD not received within 3 minutes after receiving flag.
Procedure
Remote terminal failure. Re-try the Fax job
09/03
2-494
Initial issue
DC 3535/2240/1632, WC M24