This field reports the number of accepted frames on this PM instance, exposed here as cienaCesPmBasicTxRxCurrBinRxAcceptedFrames. On this Ciena CES port's PM data, in this bandwidth-profile-aware PM group, 'accepted' frames are the ingress frames that conformed to this port's committed bandwidth profile and were let through, the frame-count companion to RxAcceptedBytes; and this is in the currently open bin of that same basic bandwidth-profile-aware PM group — it keeps accumulating until its Duration elapses and it rolls into history, so reading it mid-interval gives you a partial, still-growing count. For example, a moderately busy port showing 367,000 accepted frames for this bin would be a plausible, unremarkable reading.