the goal is to page mobiles…
type 1/2/3 depends on the type of pagings generated by the MSC : IMSI Paging or TMSI paging.
if the MSC generates 4 TMSI pagings, then the paging request will be type 3 (4 x TMSI paging within a single paging request)
etc…
ps: please don’t put me my name in your message, because other ppl could have answered you.
cheers,
pix