This read-write integer sets Trm, the maximum time in milliseconds an active standard-ABR source is allowed to go between sending forward RM cells, ensuring feedback opportunities occur at least this often even during periods of low cell volume. Admins configure this as a time-based backstop to the cell-count-based Nrm parameter, guaranteeing periodic rate feedback regardless of how much data traffic is flowing. For example, even if a source isn't sending enough cells to trigger an RM cell via the Nrm count, ausmStdABRTrm forces one to be sent once this time interval elapses.