Section: 4.3.1 Offline charging functions 4.3.1.0 General
Content: Figure 4.3.1.0.1 provides an overview of the offline part of the common charging architecture of Figure 4.2.2.1. The figure 4.3.1.0.1 depicts the logical charging functions as well as the reference points between these functions and to the BD. CTF: Charging Trigger Function CDF: Charging Data Function CGF: Charging Gateway Function BD: Billing Domain. This may also be a billing system/ billing mediation device. Figure 4.3.1.0.1: Logical ubiquitous offline charging architecture NOTE: Although not visualised in this figure 4.3.1.0.1, the OCS can also produce CDRs, i.e. act as a domain / service / subsystem element with embedded CTF, see clause 4.3.2.3.