Xerox 3550 manual Controller, Purpose, Memory Components, Additional Information, Volatile Memory

XEROX WorkCentre 3550 Information Assurance Disclosure Paper

2.2.Controller

2.2.1.Purpose

The controller provides both network and direct-connect external interfaces, and enables copy, print, email, network scan and LanFAX functionality. Network scanning and LanFAX are standard features. The controller also incorporates a proprietary web server that exports a Web User Interface (WebUI) through which users can submit jobs and check job and machine status, and through which system administrators can remotely administer the machine.

The controller contains the image path, which uses proprietary hardware and algorithms to process the scanned images into high-quality reproductions. Scanned images may be temporarily buffered in DRAM to enable electronic pre-collation, sometimes referred to as scan-once/print-many. When producing multiple copies of a document, the scanned image is processed and buffered in the DRAM in a proprietary format. The buffered bitmaps are then read from DRAM and sent to the Image Output Terminal (IOT) for marking on hardcopy output. For long documents, the production of hardcopy may begin before the entire original is scanned, achieving a level of concurrency between the scan and mark operations.

The controller operating system is pSOS v2.5. The controller works with the User Interface (UI) assembly to provide system configuration functions. A System Administrator PIN must be entered at the UI in order to access these functions.

2.2.2. Memory Components

Type (SRAM, DRAM,	Size
etc)
SDRAM	256/512
	MB

Additional Information:

Volatile Memory

User	Function or Use
Modifiable
(Y/N)
Expandable	Main Memory
to 512 MB

Process to Sanitize

Remove power

Non-Volatile Memory

Type (Flash, EEPROM, etc)

Flash

Flash ROM

Flash

Size

32 MB

1MB

8 MB

User	Function or Use
Modifiable
(Y/N)
No	Operating System, PDL
	Interpreters, Fonts, MIB, Fax
	Journal List, Fax Dialing, Code
	used for scheduling the
	marking of jobs
No	Backup
No	Fax/Font Backup

Process to Sanitize

None

None

None

Additional Information: All memory listed above contains code for execution and configuration information. No user or job data is permanently stored in this location.

Table 2 Controller memory components

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