5.2.5 Bc CDR file transfer
32.2503GPPCharging managementCircuit Switched (CS) domain chargingRelease 17Telecommunication managementTS
There are two options for the transfer of the above CDRs to the Billing domain:
1) use the file based interface specified in earlier 3GPP releases, as documented in annex A of the present document;
2) apply the Rel-6 file based interface, Bc, as specified in TS 32.297 [52].
It is left to operator and vendor choice which one (or both) of the above interfaces to implement.