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Receiver
Abbre-
Signal
viation
INFO
INFO0a Report the modem
sequence
Tone A
Tone A
INFO
INFO0h Report the pre-empha-
sequence
• Primary channel equalizer training (Phase 3)
Filters, such as equalizers, are trained (adjusted) with the parameters set in
phase 2.
Transmitter
Abbre-
Signal
viation
S signal
S signal
PP signal
TRN signal
TRN
G3 FACSIMILE COMMUNICATIONS
Meaning
capabilities, such as
baud rate and fre-
quency transmission
ability.
A
Modem synchroniza-
tion with a 2400-Hz
A
tone signal.
sis filter and baud rate
used for data transmis-
sion based on the result
of analysis of the prob-
ing signal.
Meaning
S
Short training
S
PP
The other modem uses
this signal to train the
equalizer.
The receiver uses this
signal to determine the
transmission speed.
1
Remarks
Transmission
speed: 600bps
2
3
The phase of the
A- signal is
inverted 180
degrees from the
4
phase of the A
signal.
Transmission
5
speed: 600bps
6
ït
çi
Remarks
The phase of S is
shifted from the
phase of S.
5–79
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