Version 

Definition 

Offline Charging System (OFCS) is defined using the Charging architecture and principles outlined by 3GPP TS32.240 (Ref 1) as the baseline. It is constructed as a set of capabilities to facilitate charging for telecom network connectivity services delivered by the CSP characterized by, and limited to:

• Interoperability with the core network
• The ability to interoperate with network elements via the Diameter Rf interface
• Charging Domain components
• Charging Data Function (CDF) – with or without a coupled CGF
• Charging Gateway Function (CGF) – when coupled with the CDF to provide full OFCS functionality. Not to be used as a stand-alone CGF.
• Interoperability between the CDF and the CGF via a supported interface, to facilitate CDR generation and data flow to downstream Billing Domain (BD) systems
• Commercial Models and purposes
• Direct B2C connectivity 
• Direct B2B connectivity
• Telecom network inbound roaming
• Telecom network outbound roaming

This Right to Use (RTU) grants the licensee the right to use DigitalRoute’s Usage Engine – Private Edition software in accordance with this definition.