It varies based on the CMTS. To turn on pre-equalization, add the appropriate command to the upstream configuration in the CMTS. If the command is already in there, then it’s turned on. Following are the commands for Cisco, Arris and Casa.
- Cisco CMTS Example: cable upstream 0 equalization-coefficient
- Arris CMTS Example: cable pre-eq-enable true
- Casa CMTS Example: logical-channel 0 pre-equalization