ADC 3 Downstream interleave-depth

ADC Telecommunications, Inc.
386 CHAPTER 18: CONFIGURING CABLE MODEM TERMINATION SYSTEMS
Downstream interleave-depth
The Downstream interleave-depth parameter sets the FEC Interleaving for
the downstream channel. By default, the Downstream interleave-depth for
DOCSIS is set at taps32Increment4. A higher value improves protection from
noise bursts; however, it may slow down the downstream data transfer rate.
The Downstream interleave-depth for EuroDOCSIS must be set at
taps12Increment7.
NOTE: The first time you install a EuroDOCSIS module you must set the
interleave depth to taps12Increment7, in order for the cable modem s to
register with the downstream channel.
You set the downstream interleave depth by performing the following tasks.
Task Command
1. Enter interface cable mode. interface cable <c/s/i>
2. Configure the DOCSIS
downstream interleave depth.
Valid interleave depth values:
■taps8Increment16
■taps16Increment 8
■taps32Increment4
■taps64Increment2
■taps128Increment1
downstream interleave-depth
{8 | 16 | 32 | 64 | 128}
3. Configure the EuroDOCSIS
downstream interleave depth.
The valid interleave depth value
is: taps12Increment7
downstream interleave-depth 12