This read-only integer reports the lowest receive signal level, in dBm, recorded by the link interface during the current, in-progress 15-minute interval. An engineer watches this alongside the current maximum to catch a brief but sharp fade dip happening in real time before the interval closes. For example, a suddenly low wvlinkCurrentMinimumRSL reading compared to the current average would flag a transient signal drop worth investigating immediately, such as a passing vehicle briefly obstructing a low-mounted antenna path.