Ricoh M281 Series - IP-FAX RECEPTION; Cannot receive via IP Address;Host Name

IP-Fax Troubleshooting
D255/D256 FAX OPTION 54 SM
Raise the delay level.
(IPFAX SW 01 Bit 0 to 3)
Lower the modem transmission baud
rate.
(IPFAX SW 05)
16 Remote fax cancelled transmission? Check whether the remote fax
cancelled the transmission.
3.4.2 IP-FAX RECEPTION
Cannot receive via IP Address/Host Name
Check Point Troubleshooting Procedures
1 LAN cable connected? Check the LAN cable connection.
2 Firewall/NAT installed? The firewall cannot be breached. Send by
another method (Fax, Internet Fax)
3 IP address of local fax registered? Register the IP address.
4 Port number specified at remote sender
fax (if required)?
Request the sender to specify the port
number.
5 Specified port number correct (if
required)?
Request the sender to check the port
number.
6 DNS server registered when host name
specified on sender side?
Contact the network administrator.
 The sender machine displays this
error code if the sender fax is a
Ricoh model.
7 Network bandwidth too narrow? Request the system administrator to
increase the bandwidth.
Lower the start modem reception baud
rate on the receiving side.
(IPFAX SW06)