Alright, so I just checked the beeps, and it beeps like this:

5, 2, 2, 1

(5 Beeps, then 2 beeps, then 2 beeps, then 1 then nothing)

This doesn't seem to match any of the 2 and 4 Dell beeps. Am I misintepereting the chart? What do those numbers mean: Number of beeps per interval, or length of interval? Please explain ice!