System information

Configuring the CMTS
6-21
Initial Upstream Configuration Tasks
Follow these tasks for the initial configuration of the upstream channel:
• Setting the Upstream Frequency
• Setting the Upstream Power Level
• Applying an Upstream Modulation Profile
• Enforcing the Upstream CM Rate Limit
• Enabling an Upstream Port
Setting the Upstream Frequency
The cable interface does not operate until a fixed upstream frequency is set. The RF
upstream frequency must comply with the expected CM output frequency.
1. To set the upstream frequency for an upstream port, use the cable upstream
frequency command in Interface Configuration mode, as shown below:
MOT(config-if)#cable upstream <NUM> frequency
<5000000-42000000>
where:
NUM is the upstream port number.
5000000-42000000 is the upstream frequency value in Hertz (Hz) for
DOCSIS.
Note: Make sure that the upstream frequency selected does not interfere
with the frequencies used for any other upstream applications running in the
cable plant.
Note: Upstream frequency ranges are different depending on your regional
implementation of DOCSIS or Euro-DOCSIS. The frequency ranges that
appear in the CLI help are related to your implementation of DOCSIS. The
upstream frequency value for Euro-DOCSIS is 5000000 to 65000000 Hz.