Ricoh M281 Series Service Manual page 891

11 Remote fax cancelled transmission?
12 Local fax registered in Gatekeeper/SIP
server?
SM
Check whether the remote fax cancelled
the transmission.
Contact the network administrator.

The sender machine displays this
error code when the sender fax is
a Ricoh model.
57
IP-Fax Troubleshooting
D255/D256 FAX OPTION