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ADC Telecommunications, Inc.
422 C
HAPTER 18: CONFIGURING CABLE MODEM TERMINATION SYSTEMS
Fec-len
The Fec-len parameter is the number of data bytes (k) in the forward error
correction codeword. Acceptable values are 1 to 255. Note that this
parameter is not used if FEC-tbytes is zero.
You set the codeword length by performing the following tasks:
.
Seed
The Seed parameter is the 15 bit seed value for the scrambler polynomial. By
default, Seed is set to 338.
You set the scrambler seed by performing the following tasks:
.
Task Command
1. Enter cable interface
mode.
interface cable <c/s/i>
2. Configure the
codeword length.
modulation-profile <profile number>
interval-usage {initial | long | request | short |
station} fec-len <1...255>
Task Command
1. Enter cable interface
mode.
interface cable <c/s/i>
2. Configure the
scrambler seed value.
modulation-profile <profile number>
interval-usage {initial | long | request | short |
station} seed < 0x0000..0x7fff>