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cable upstream scrambler
cable upstream scrambler
To enable the cable upstream scrambler, use the cable upstream scrambler command in cable interface
configuration mode. To restore the default configuration value for this command, use the no form of this
command.
Syntax Description
n
Defaults
Disabled
Command Modes
Interface configuration (cable interface only)
Command History
Release
11.3 XA
Usage Guidelines
This command causes CMs to enable their pseudo-random scrambler circuitry to improve the robustness
of the upstream receiver on the line card.
The scrambler on the upstream radio frequency (RF) carrier enables CMs on the HFC network to use
built-in scrambler circuitry for upstream data transmissions. The scrambler circuitry improves reliability
of the upstream receiver on the cable interface line card. The upstream scrambler is activated by default
and should not be disabled under normal circumstances.
Scrambler must be activated for normal operation. Deactivate only for prototype CMs that do not support
Caution
scrambler.
Examples
The following example shows how to activate the upstream scrambler:
router(config-if)# cable upstream 0 scrambler#
Related Commands
Command
cable upstream fec
cable upstream frequency
Cisco Broadband Cable Command Reference Guide
2-346
cable upstream n scrambler
no cable upstream n scrambler
Specifies the upstream port number. Valid values start with 0 for the first
upstream port on the cable interface line card.
Modification
This command was introduced.
Chapter 2
Description
Enables the upstream FEC.
Enters a fixed frequency of the upstream RF carrier for an
upstream port.
Cisco CMTS Configuration Commands
OL-1581-08
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