System information

Configuring the CMTS
6-27
Managing the Upstream Channel
The following upstream tasks in this sections are used to manage or improve the
performance of the upstream channel:
• Configuring Upstream CM Registration Parameters
• Adjusting for Physical Delay between Cable Interface and CMs
• Activating Upstream Forward Error Correction
• Activating the Scrambler on the Upstream Channel
• Enabling Pre-equalization
• Forcing the Fragmentation of Large Upstream Packets
• Disabling an Upstream Port
• Configuring the Upstream Channel Descriptor
• Limiting the Number of Voice Calls on an Upstream Channel
Configuring Upstream CM Registration Parameters
Configuring upstream CM registration parameters includes the following options:
• Setting the Upstream Minislot Size
• Setting the Upstream Channel Width
• Setting the Upstream Range-backoff
• Forcing a Range-response
• Forcing a Range Power Override
• Setting the Upstream Data-backoff
• Configuring the Invited Ranging Interval
• Configuring the Map Interval
Follow these options to configure upstream CM registration parameters:
• The minislot size is the number of time ticks. To set the upstream minislot size,
use the cable upstream minislot-size command in Interface Configuration mode,
as shown below:
MOT(config-if)#cable upstream <NUM> minislot-size [2 | 4 | 8 | 16 | 32 |
64 | 128]