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:
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the XCAP Server in Sentinel Authentication Gateway.
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the REST Provisioning API
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and various screens in REM.
When using HLR, it is accessed through:
Session processing uses the Sh Cache Microservice RA via the SubscriberDataLookupFromHSS feature or CGIN RA via SubscriberDataLookupFromHLR.
For more information, see Sh Cache Microservice RA configuration and Supplementary Service Data Access.
