Nortel 5399 参考指南
11
Parameter 3
Model 5399 RAC Digital Modem Configuration Notes
D: Dictionary Size - The dictionary stores recurrent data patterns which
are used in V.42bis data compression. As a rule, the larger the
dictionary, the better the modem is able to compress data. Both
modems attempting to make a connection must use the same dictionary
size and will use the largest dictionary available to both modems. The
first digital modem release supports a dictionary of 512 bytes only.
0: Dictionary Size 512 bytes
1: Dictionary Size 1024 bytes
10: Dictionary Size 2048 bytes
dictionary, the better the modem is able to compress data. Both
modems attempting to make a connection must use the same dictionary
size and will use the largest dictionary available to both modems. The
first digital modem release supports a dictionary of 512 bytes only.
0: Dictionary Size 512 bytes
1: Dictionary Size 1024 bytes
10: Dictionary Size 2048 bytes
Parameter 3
Default config_bytes Setting:
Decimal base: 29
Octal base: 035
Hexadecimal base: 0x1D
Octal base: 035
Hexadecimal base: 0x1D
C: MNP Class - This option limits MNP operation to the specified MNP
class or lower. Classes 1 through 4 support error correction only, while
class 5 also supports data compression. Some early MNP-only
modems improperly negotiate MNP class and may require the host
modem to disable higher classes of operation.
0: Unused
1: Class 1
10: Class 2
11: Class 3
100: Class 4
101: Class 5
class 5 also supports data compression. Some early MNP-only
modems improperly negotiate MNP class and may require the host
modem to disable higher classes of operation.
0: Unused
1: Class 1
10: Class 2
11: Class 3
100: Class 4
101: Class 5
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
0
0
1 1 1 0 1
Descr.
Unused
Reserved
B
C