Nortel 5399 参考指南

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Model 5399 RAC Digital Modem Configuration Notes
Parameter 27
26
Parameter 27
Default config_bytes Setting:
Decimal base: 96
Octal base: 0140
Hexadecimal base: 0x60
P4_TR: Phase 4 Training - The Phase 4 Training constellation option 
allows you to specify a 4 point or 16 point signal constellation during 
the final phase (phase 4) of training. The default setting (Negotiable
allows the modem to make this determination. 
0: Negotiable
1: Training 4 points
10: Training 16 points
11: Reserved
PREC: Precoding - Precoding is a non-linear equalization method that 
uses information provided by the remote modem to reduce equalizer 
noise enhancement caused by amplitude distortion.
0: Negotiable
1: Mandatory
10: Disable
11: Reserved
Bit
15 14 13 12 11 10  9  8  7   6  5
 4
 3
 2
1
0
Value
0
0
0
0
0
0
0 0 0
1
1
0
0
0
0
0
Descr.
Unused
NE
SHAP
PREC
P4_TR