This read-only INTEGER reports the Maximum Number of Cells a source may send for each forward RM-cell in the forward direction for the ABR call, with a default of nrm32(5). An administrator uses this to understand how frequently this ABR call's rate-management cells are interspersed with data cells, which affects how quickly the closed-loop feedback can react. For example, an ABR call negotiated with a smaller NRM value inserts forward RM-cells more often relative to data cells, giving the network tighter and more frequent feedback on that specific call's rate.