use "3GPP‑Page" to get the last Word version
use "ETSI‑search" to get the last Rel-15 PDF version, when it is available
the ToC, based on the last 3GPP Word version, is reproduced for a better overview
This TS specifies the mechanisms used to transfer CDR files from the network to the operator's billing domain (e.g. the billing system or a mediation device). This includes the file transfer procedures and the layout of the CDR files, as well as file meta information and the encoding of the CDRs within the files.