Nortel 5399 参考指南
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
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
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
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