This read-only floating-point object reports the Background Blocks Error Rate measured on the link interface during the current, in-progress 15-minute interval. An engineer checks this for the most up-to-date view of subtle block-level errors happening right now, ahead of when this interval's data rolls into the historical table. For example, an operator noticing wvLinkCurrentBBER climbing steadily through several consecutive checks within the same interval could flag a developing issue before the interval even finishes.