Hi Tomas,
Depending on the vendor you will have different “keys”: OIN/TIN, OICK/TICK, O/T-CSI, etc.. You can use MAP SRI / ACK to provide an indication. The whole purpose of SRI is to help with call routing so that a call / session can be established.
If you want to see the customer split in terms of PrePaid, Postpaid, Hybrid, etc.. you will have to look at the CSP’s OCS platform. With one vendor’s solution I used different SC – Service Classes – values for Prepaid and Postpaid.
VBR/ Wallis Dudhnath