This read-only integer reports the average receive signal level, in dBm, the link interface has measured since it last came up, smoothing out momentary fluctuations into a single representative figure. An engineer uses this cumulative average to characterize the overall RF quality of the current link session at a glance. For example, comparing wvlinkAverageRSL across several terminals on the same tower helps identify which antenna might be misaligned relative to its peers.