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Connection Control Mode Telephone Network Signal Mode
Terminal Control Mode
Facsimile Signal Format
Modulation Mode
Transmission Speed
Redundancy
Compression
Process
(Coding Mode)
Resolution
Line Synchronization
Signal
1 Line Transmission Time
[ms/line]
6. Explanation of Technology
a. G3 Communication Signals (T. 30 Binary Process)
For G3 facsimile communication, this is the procedure for exchanging control signals between
the sending and receiving machines both before and after transmission of image signals. /
Control signals at 300 bps FSK are: 1850 Hz...0, 1650Hz...1. / An example of the binary process
in G3 communication is shown below.
Explanation of Signals
Control signals are comprised mainly of 8-bit identification signals and of the data signals
added to them. Data signals are added to DIS and DCS signals.
Signal.....DIS (Digital Identification Signal) / Identification Signal Format.....00000001
Function: / Notifies the capacity of the receiving unit. The added data signals are as follows.
Telephone Network Facsimile
G3 Machine
T. 30 Binary
Digital
PSK (V. 27 ter) or QAM (V. 29)
300 bps (Control Signal)
2400, 4800, 7200, 9600 bps (FAX Signal)
1 dimension: MH Mode
2 dimension: MR Mode (K=2.4)
Main Scan: 8 pel/mm
Sub Scan: 3.85, 7.7l/mm
EOL Signal
Depends on the degree of data reduction.
Minimum Value: 10, 20
Can be recognized in 40ms.
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