Specifications

Print Controller Design Guide for Information Security:
Page 54 of 92
• With FAX reception, the incoming data is received by the FCU, which then sends the printing
command to the FAX function via the FCUH and FCS. The FAX function then forwards the printing
command to the ECS via the FCS, and the printing engine is activated. The FAX image data is then
sent from the FCU to the printing engine for printing out.
• With Internet FAX transmission, the image data is sent from the FCU to the HDD and then on to the
host I/F, which sends the data to its destination via the network. With Internet FAX reception, the
image data is sent to the MFP over the network, after which it is sent to the FCU via the HDD and
then stored in FCU memory. After this, the printing process is the same as described above.
• With Internet FAX transmission and regular FAX/IP-FAX memory transmission, the image data
goes through MMR compression and is stored in SAF memory on the FCU. A battery for the SAF
memory cell allows the data to be retained for one hour. The page location data is stored in SRAM,
and can be erased from memory in SP mode by executing an SRAM initialization, SAF memory
initialization or a factory settings reset.
• When sending a FAX that will also be stored to the Document Server, the image data is first stored
in the HDD and then sent to its destination via the network or telecommunications line. Conversely,
when receiving a FAX for storage to the Document Server, the image data is saved to the HDD.
• With LAN FAX transmission, the data sent from the PC is stored in the HDD or in the FCU if the
MFP does not have an HDD. After this, the transmission flow is the same as described above.
• With IP-FAX transmission, the data flow is the same as with normal FAX transmission described
above, except that instead of being sent via the telecommunications line, the image data is sent
from the FCU to the FCS and then transmitted over the IP network via the network I/F of the
controller. Similarly, IP-FAX reception does not receive incoming data through the
telecommunications line, but rather through the network I/F of the controller. After this, the data is
sent from the FCS to the FCU and then printed out.
• Incoming image data received through regular FAX reception, IP-FAX reception and Internet FAX
reception is compressed and then stored in SAF memory. The data is then decompressed, after
which the printing engine initiates the image printing process.