Xerox WorkCentre 6505 Service Manual

Phaser 6500/WorkCentre 6505 Service Manual Xerox Internal Use Only 2-73
Theory of Operation
Fax Standards (ITU-T Recommendations)
International Fax Standards (ITU-T Recommendations) include G1 to G4. G1 to
G3 use analog telephone networks. G4 uses a digital telephone network (ISDN).
G3 is the standard that is currently in use. Faxes conforming to Super G3, a recent
added standard, are equipped with a fast 33.6kps modem and reduce
transmission times to about half those of G3 Faxes.
Fax Standards
Standard
Minimum
Transmission
Time for
Single-Page
A4 Document
Maximum
Resolution
Maximum
Transmission
Speed Features
Group 1
(G1)
Approx. 6 min. 100 x 100 dpi (Analog) Analog
transmission.
No band
compression.
Group 2
(G2)
Approx. 3 min. 100 x 100 dpi (Analog) Analog
transmission.
Band compression
technology
adopted.
Group 3
(G3)
Approx. 1 min. 200 x 200 dpi 14.4kbps
(Super G3:
33.6kbps)
Connection to
analog line using
Fax modem.
Image data in
digital format.
Data compression.
Most common
standard in use.
Group 4
(G4)
Approx. 3 sec. 400 x 400 dpi 64kbps
(using ISDN)
Digital
transmission.
Supported by
various digital
transmission
services.
Halftone
supported.

Xerox WorkCentre 6505 Specifications

General

Print Technology	Laser
Copy Resolution	Up to 600 x 600 dpi
Standard Paper Capacity	250 sheets
ADF Capacity	35 sheets
Functions	Print, Copy, Scan, Fax
Processor	533 MHz
Memory	256 MB
Fax Transmission Speed	33.6 kbps
Monthly Duty Cycle	40, 000 pages
Connectivity	USB 2.0, Ethernet 10/100Base-TX
Maximum Paper Size	8.5 x 14 in
Operating System Compatibility	Windows, Mac, Linux
Print Resolution	Up to 1200 x 2400 dpi