Section: 4.4.1.4 Bx
Content: The Bx reference point supports interaction between a CGF and the BD. The information crossing this reference point is comprised of CDR files. A common, standard file transfer protocol (e.g. FTAM, FTP) shall be used, including the transport mechanisms specified for the selected protocol. This interface application is defined in TS 32.297[ Telecommunication management; Charging management; Charging Data Record (CDR) file format and transfer ]  [52]. The information contained in the files corresponds to the CDRs defined per domain/subsystem/service, as stated in clause 4.4.1.3.