This field reports the number of remarked frames received on this PM instance, exposed here as cienaCesPmBasicTxRxHistoryBinRxYellowFrames. On this Ciena CES port's PM data, the description calls this 'remarked' traffic, the frame-count companion to RxYellowBytes — frames that exceeded this port's committed rate and were recolored rather than dropped, and are the first candidates to be discarded if congestion hits downstream; and this lives in the basic bandwidth-profile-aware PM group's history bin — a closed-out interval whose own Duration and State tell you how long it ran and whether it closed cleanly, so the number is settled rather than still being written to. For example, a link under light load might show a low but steady 28 remarked (yellow) frames for this bin; it's the rate of growth, not the presence of a nonzero number, that would flag a real problem.