Ricoh M281 Series Service Manual page 842

Fax Connection Unit Type M24 (D3CP-05, 06, 07)
4. Select the Special Sender.
5. Press [Remote Reception Setting per Sender].
6. Press [On].
7. Press [Remote Machine].
8. Enter an IP address or a host name of the client machine to connect.
9. Press [OK] to exit from the setting.
D255/D256 FAX OPTION 8 SM