Technical information

Cuda 12000 IP Access Switch CLI Reference Guide
modulation-profile 257
Arguments
Example
Related Commands
■ no modulation-profile on page 276
■ show interface cable <c/s/i> modulation-profile on page 425
<profile-number> The profile number identifies this modulation profile.
Interval-usage Valid usage codes are initial, short, long, request, and station.
fec-tbytes <number> Specify the number of FEC Error Correction bytes. The number of
bytes ranges from 0 to 10, where 0 implies no FEC.
fec-len <number> The number of data bytes (k) in the forward error correction
codeword. Acceptable values range from 8 to 255.
burst-len <number> The maximum number of mini-slots that can be transmitted during a
channel’s burst time. A value of zero is transmitted if the burst length
is bounded by the allocation MAP rather than this profile. The valid
range is 0 to 256.
mod {16qam | qpsk} This is the modulation rate for an upstream port. Mod can be set to
QPSK or QAM16.
scrambler This enables the scrambler. Scrambler is disabled by default.
no scrambler This disables the scrambler.
diff Enable differential encoding.
no diff Disable differential encoding.
seed <number> Specify the 15 bit seed value for the scrambler polynomial. Valid values
are 0 to 32767. The default is 338.
pre-len <number> Specify the preamble pattern length from 2 to 448 bits.
last-cw Specify the code word type as fixed or shortened.
cli:172.16.19.10:root# interface 1/1/1
mode: interface:cable:csi(1/1/1)
cli:172.16.19.10:interface:cable:csi(1/1/1)# modulation-profile 7 interval-usage
initial fec-len 8
cli:172.16.19.10:interface:cable:csi(1/1/1)#