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show cable modulation-profile
Table 3-36 Allowable Ranges for Modulation Profiles
Cable Interface
Cisco uBR-MC5X20S,
Cisco uBR-MC5X20U
Cisco uBR-MC16U/X,
Cisco uBR-MC28U/X
1. Only 8 modulation profiles are supported in Cisco IOS software releases before 12.2(15)BC1, so in these releases the valid
Default modulation profiles are created for each type of card and operation mode. You cannot delete the
Note
default modulation profiles (1, 21, 41, 101, 121, 201, 221, and 241). In Cisco IOS Release 12.2(15)BC2
and later, all default modulation profiles are displayed, even when that particular cable interface is not
installed. In previous versions, only the default modulation profiles that were in use were displayed.
Examples
The following is sample output from the show cable modulation-profile command in Cisco IOS
Release 12.2(11)BC3 and earlier releases:
CMTS01# show cable modulation-profile
Mo IUC
1
request qpsk
1
initial qpsk
1
station qpsk
1
short
The following is sample output from the show cable modulation-profile command in Cisco IOS
Release 12.2(15)CX and later releases:
Router# show cable modulation-profile
Mod IUC
1
1
1
1
1
41
41
41
41
41
45
45
45
45
45
141 request qpsk
141 initial qpsk
141 station qpsk
141 short
Cisco Broadband Cable Command Reference Guide
3-134
DOCSIS 1.X (TDMA)
21 to 30, default=21
41 to 50, default=41
range is 1 to 8.
Type
Preamb Diff FEC
length enco T
64
no
128
no
128
no
qpsk
72
no
Type
Pre Diff FEC
len enco T
request qpsk
64
no
initial qpsk
128 no
station qpsk
128 no
short
qpsk
72
no
long
qpsk
80
no
request qpsk
68
no
initial qpsk
128 no
station qpsk
128 no
short
qpsk
80
no
long
qpsk
80
no
request qpsk
68
no
initial qpsk
128 no
station qpsk
128 no
short
16qam 160 no
long
16qam 160 no
68
no
128 no
128 no
16qam 160 no
Mixed DOCSIS 1.X/2.0
121 to 130, default=121 221 to 230, default=221
141 to 150, default=141 241 to 250, default=241
FEC
Scrambl Max
CW
seed
bytes
size
0x0
0x10
0x152
0x5
0x22
0x152
0x5
0x22
0x152
0x5
0x4B
0x152
FEC
Scrmb Max Guard Last Scrmb Pre
k
seed
B
time
BYTE BYTE
siz size
0x0
0x10 0x152 0
8
0x5
0x22 0x152 0
48
0x5
0x22 0x152 0
48
0x4
0x4C 0x152 12
8
0x9
0xEC 0x152 0
8
0x0
0x10 0x152 0
8
0x5
0x22 0x152 0
48
0x5
0x22 0x152 0
48
0x4
0x4C 0x152 12
8
0x8
0xEC 0x152 0
8
0x0
0x10 0x152 0
8
0x5
0x22 0x152 0
48
0x5
0x22 0x152 0
48
0x6
0x4C 0x152 7
8
0x8
0xE7 0x152 0
8
0x0
0x10 0x152 0
8
0x5
0x22 0x152 0
48
0x5
0x22 0x152 0
48
0x6
0x4C 0x152 7
8
Chapter 3
Cisco CMTS Show Commands
DOCSIS 2.0 (A-TDMA)
Guard Last Scrambl Preamb
B
time
CW
size size
short
1
8
no
yes
0
48
no
yes
0
48
no
yes
0
8
no
yes
Pre
CW
offst Type
short
no
yes
184
qpsk
no
yes
128
qpsk
no
yes
128
qpsk
yes
yes
176
qpsk
yes
yes
168
qpsk
no
yes
0
qpsk
no
yes
0
qpsk
no
yes
0
qpsk
yes
yes
0
qpsk
yes
yes
0
qpsk
no
yes
0
qpsk
no
yes
0
qpsk
no
yes
0
qpsk
yes
yes
0
16qam na
yes
yes
0
16qam na
no
yes
0
qpsk
no
yes
0
qpsk
no
yes
0
qpsk
yes
yes
0
16qam na
offset
56
0
0
48
RS
na
na
na
na
na
na
na
na
na
na
na
na
na
na
na
na
OL-1581-08
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