This read-write integer (10..400000) is the Initial Cell Rate for a standard-ABR source, the rate in cells per second at which it should send initially and after any idle period, including both data cells and any in-rate RM cells. An administrator sets ICR to control the burst rate a source uses right when it starts or resumes sending, before the ABR feedback loop has adjusted its rate further. For example, setting frstdABRICR to a low value near the 10 cps floor would make a resuming source ramp up very conservatively compared to setting it near the 400,000 cps ceiling.