This field reports the number of accepted bytes on this PM instance, exposed here as cienaCesPmBasicTxRxCurrBinRxAcceptedBytes. On this Ciena CES port's PM data, in this bandwidth-profile-aware PM group, 'accepted' bytes are the ingress traffic that conformed to this port's committed bandwidth profile and was let through, so this is effectively the 'green' side of the port's ingress policing decision; 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 4,690,000 accepted bytes for this bin would be a plausible, unremarkable reading.