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DIALING/COMMUNICATION CONTROL
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3
- Equalizer and echo canceller training (Phase 3)
Training (adjustment) is performed according to the parameters set in the phase 2 to optimize the
filters such as an equalizer.
Transmitter
- Final training (Phase 4)
The settings such as the maximum value for the data rate, selection of the trellis encoder, and
data rate which can be supported are made in this phase.
Transmitter/receiver
Signal name Abbreviation Function Remarks
S signal S Short training
is a signal made as the
result of phase transition of S.
signal
PP signal PP Used by the modem of the
receiver to train the equalizer.
TRN signal TRN Used by the receiver to deter-
mine the transmission rate.
Signal name Abbreviation Function Remarks
PPh signal PPh Used by the modem of the
other side to train the equal-
izer.
ALT signal ALT -
Modulation parameter MPh Informs the parameters used
for the image transmission
such as maximum data signal
rate and type of the trellis cod-
ing/pre-coding.
E sequence E - 20 bit sequence of “1”s in
binary
S
S S