In Sentinel VoLTE, subscriber data is stored either as transparent user data in the HSS or in the HLR.

When using HSS, it is accessed through:

When using HLR, it is accessed through:

Session processing uses the Sh Cache RA via the SubscriberDataLookupFromHSS feature or CGIN RA via SubscriberDataLookupFromHLR.

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Sentinel VoLTE Version 2.7.0