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6.3
Basic Transmission Control Procedure
This is the basic transmission control procedure in G3 communications.
We recommend fully understanding this control procedure as it is the most
basic of the procedures.
Note, however, that operation differs on V.34 MODEM installed facsimiles
as they use the V.8 procedure. For details, see 5.6 V.34 MODEM Technol-
ogy.
The following describes the basic transmission control procedure with spe-
cific parts of the overview in Fig. 5-65 extracted for explanatory purposes.
Calling Side (transmitter)
Dial
CNG
This is an auto-dial
facsimile.
CNG
Receive in G3 mode.
DCS
Training
Line check
TCF
Training
Message
Image of one page
RTC
End of image
EOP
Disconnect line.
DCN
Line disconnected
Fig. 5-65 Basic Transmission Control Procedure
G3 FACSIMILE COMMUNICATIONS
Called side (Receiver)
Call
Response
This is an auto-reception
CED
facsimile.
DIS
This is a G3
facsimile.
DIS
CFR
Ready to receive
Image was received
successfully.
MCF
Line disconnected
1
2
3
6.3.1
Tonal procedure
4
6.3.2
Initial identification
6.3.3
5
Receive command
6.3.4
Training/pre-message response
6
6.3.5
Message transmission
6.3.6
Post-message Commands
6.3.7
ït
Post-message responses
6.3.8
Other control signals
çi
5–91
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