Fuji Xerox DocuPrint M355df User Manual

Chapter 10 Principle of Operation
10.6 FAX Standards (ITU-T Recommendations)
10-14
10.6 FAX Standards (ITU-T Recommendations)
International FAX standards (ITU-T recommendations) include G1 to G4. G1 to G3 use analog telephone net-
works. G4 uses a digital telephone network (ISDN). G3 is the standard currently in greatest use. FAXes con-
forming to Super G3, a recently added standard, are equipped with a fast 33.6kps modem and reduce
transmission times to about half those of G3 FAXes.
Table 10-1
Standard
Year
Issued
Minimum
Transmis-
sion Time for
Single-Page
A4 Document
Maximum
Resolution
Maximum
Transmission
Speed
Features
Group1
(G1)
1968
Approx. 6
min.
100 x 100dpi
-
(Analog)
First standard.
Analog transmission.
No band compression
technology
Group2
(G2)
1976
Approx. 3
min.
100 x 100dpi
-
(Analog)
Analog transmission.
Band compression technology
adopted.
Group3
(G3)
1980
Approx. 1
min
(14.4kbps)
Approx. 3 sec
(33.6kbps)
600 x 600dpi
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.
Group4
(G4)
1988
Approx. 3
sec.
400 x 400dpi
64kbps
(Using ISDN)
Digital transmission.
Supported by various digital
transmission services.
Halftone supported.

Fuji Xerox DocuPrint M355df Specifications

General

Brand	Fuji Xerox
Model	DocuPrint M355df
Category	Printer
Language	English