Like any Time-Space-Time (TST)Switch charging data is generated and is captured via Toll Tickets, CDRs, etc..
TST Switches are configured with business requirements strongly in mind. For flexibility a raft of CDRs can be generated for Voice, Data, SMS, IN, Roaming, etc.. traffic.
As TST SPC Switches have matured with GSM (GPRS), 3G, 4G (Data) a raft of Traffic Use Cases are supported. For details look at 3GPP.
VBR/ Wallis Dudhnath