Xerox Phaser 6500 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 Phaser 6500 Specifications

General

Monthly Duty Cycle	Up to 40, 000 pages
Duplex Printing	Manual
Print Technology	Laser
Maximum Print Resolution	600 x 600 x 4 dpi
First Page Out Time	As fast as 12 seconds
Connectivity	USB 2.0, Ethernet
Paper Capacity	250 sheets + 1 sheet bypass tray
Supported Operating Systems	Windows, Mac OS, Linux
Print Speed	Up to 24 ppm (color) / Up to 24 ppm (black)