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What is the difference between OCS and PCRF?

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What is the difference between OCS and PCRF?
posted Feb 3, 2020 by Akhilesh

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We have complexity linked to Gy and Gx interfaces.

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I am going through the spec 3gpp 29.219(Sy interface) and trying to understand the call flow and AVPS between the OCS and PCRF.

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