All standardised Supplementary Service Data is located in either the HLR (for GSM networks) and/or the HSS (for IMS networks), and/or in a convergent HLR/HSS.
When accessing Supplementary Service Data from the HSS, the Diameter Sh interface is used. The Supplementary Service Data is stored according to standardized XML schemas within Transparent User Data.
When accessing Supplementary Service Data in the HLR, the GSM MAP protocol is used. Supplementary Service Data is stored according to standardized schemas (often ASN.1 defined).
All components that need access to any data from the HSS, including both Transparent and Non-transparent data, access it through the Sh Cache Microservice component. Components that use Supplementary Service Data in the HSS include:
Cache warming of the Served User’s Supplementary Service Data upon Initial Registration
Sentinel VoLTE MMTel Features
Supplementary Service Data is necessary for many features to operate
The purpose of the XCAP server is to enable subscribers to query and modify their service settings
Transparent Data editing capability within the Rhino Element Manager
This capability enables an administrator to query and edit the Supplementary Service Data
For more information about the Sh Cache Microservice see Sh Cache Microservice architecture
All components that need access to data from the HLR, access it through the CGIN MAP component. Components that use Supplementary Service Data in the HLR include:
Sentinel VoLTE MMTel features - Supplementary Service Data is necessary for many features to operate