This read-write value sets the Minimum Cell Rate for this channel; although the shipped MIB description text for this object duplicates the Sustainable Cell Rate explanation verbatim, an apparent documentation copy-paste error, the object's name and syntax identify it as the MCR parameter relevant to ABR connections. Because the source text doesn't reliably describe this specific field, an admin should treat it as the guaranteed minimum bandwidth floor typically associated with ABR service rather than relying on the literal, mismatched, description. On an ABR channel, bbChanUpcMCR would represent the rate below which the connection's throughput is never allowed to be policed, regardless of network congestion.