Numerical value describes start offset and is an optional field. Numerical value of 20 means that blackbox data is requested starting from 20th latest event. When # is omitted the latest events are packed to single SMS.
X1-Y1:Z1,X2-Y2:Z2,…,Xn-Yn:Zn, where Xn – timestamp in HEX. Yn – HEX value of event ID. Zn – HEX value of custom data field (optional).