XEROX WorkCentre 6400 Information Assurance Disclosure Paper11Ver. 1.00, May 2010 Page 11 of 44Foreign Device Interface (FDI) Allows connection of optional access control hardwareTable 4 Controller External Connections2.2.4. USB Host PortThe WorkCentre 6400 contains a host connector for a USB flash drive, enabling upload of software upgrades anddownload of network logs or machine settings files.Modifying the software upgrade, network logging or saved machine settings files will make the files unusable on aWorkCentre 6400.The data in the network logging file is encrypted and can only be decrypted by Xerox service.The machine settings that can be saved and restored by a service technician are limited to controller and faxparameters that are needed for normal operation. For example, the fax address book can be saved and restored by aservice technician.There is no method for a user, administrator or technician to move image data from the WorkCentre 6400 to a USBdevice.2.2. Fax Module2.3.1. PurposeThe embedded FAX service uses the installed embedded fax card to send and receive images over the telephoneinterface.2.3.2. HardwareThe Fax module contains the fax modem and RJ-11 connector. The Fax modem implements the T.30 fax protocol.The Fax module contains a CPU, BIOS, RAM, and Non-Volatile Memory.Volatile Memory DescriptionType (SRAM, DRAM, etc) Size User Modifiable(Y/N)Function or Use Process to Clear:SRAM 128Kb N Executable code, control data Power Off SystemAdditional Information:All memory listed above contains code for execution and configuration information. No user or job data is permanently stored in this location.Non-Volatile Memory DescriptionType (Flash, EEPROM, etc) Size User Modifiable(Y/N)Function or Use Process to Clear:Flash 512KB via Diagnostics Set points, configuration settings DiagnosticEEPROM 16Kb via Diagnostics Set points DiagnosticAdditional Information:All memory listed above contains code for execution and configuration information. No user or job data is stored in this location.Table 5 Fax Module memory components