This read-write enumeration (enable(1), disable(2)) turns on the SAR Information Rate programming option for the channel, and per its description it is mutually exclusive with ForeSight; it is not supported on FRSM12. An administrator enables it specifically when they want direct control over chanServiceRate rather than letting ForeSight dynamically manage the connection's rate. For example, enabling chanServiceRateOverride on a channel would first require disabling foreSightEnable on that same channel, since the two features cannot be active together.