TM Forum currently does not have a standard API for telecom rating or charging equivalent to a 3GPP OCS/CCS interface.
In telecom networks, real-time charging is typically handled by 3GPP-defined charging systems/interfaces (e.g. Diameter Gy/Ro, 5G CHF/Nchf APIs). That sits in the core network charging domain rather than the TM Forum Open API domain.
- 3GPP standards handle real-time charging/rating/quota control.
- TM Forum APIs expose usage, balances, billing and customer/product-facing business function
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Dan d'Albuquerque
Entronica Company Limited
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Original Message:
Sent: May 20, 2026 00:28
From: Ramesh Chelliah
Subject: TMF API for Rating and Charging
Team,
Please guide me TMF API for Rating and Charging.
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Ramesh Chelliah
Infosys
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