Calls enter a vector and execute the steps sequentially beginning with Step 1 of the vector, unless there is a goto step. Most steps take microseconds to execute. Steps with announcement, wait-time, and collect digits commands are exceptions. A 1-second wait occurs when processing is suspended. Note that the wait-time with 0 seconds is not an explicit wait. The announcement, wait-time > 0 and collect digits are explicit wait steps which suspend vector processing. The 15–step counter resets after one of these steps.