Signal & Syntax · Networks, HLR and porting
What Is an HSS?
The HSS (Home Subscriber Server) is the 4G LTE and IMS successor to the HLR. The HSS answers subscriber queries over the Diameter protocol.The HSS (Home Subscriber Server) is the 4G LTE and IMS successor to the HLR. The HSS answers subscriber queries over the Diameter protocol.The HSS (Home Subscriber Server) is the 4G LTE and IMS successor to the HLR. The HSS answers subscriber queries over the Diameter protocol.
Also calledHome Subscriber Server
Example
HSS in Practice
The HSS holds the same records as the The HSS holds the same records as the The HSS holds the same records as the HLRHLR: identifiers, services and the serving node. The HSS speaks Diameter, where the HLR speaks : identifiers, services and the serving node. The HSS speaks Diameter, where the HLR speaks : identifiers, services and the serving node. The HSS speaks Diameter, where the HLR speaks MAPMAP over over over SS7SS7. Operators running 3G and 4G side by side run both, or one combined node. In 5G core networks, the UDM takes over the role.. Operators running 3G and 4G side by side run both, or one combined node. In 5G core networks, the UDM takes over the role.. Operators running 3G and 4G side by side run both, or one combined node. In 5G core networks, the UDM takes over the role.
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HLR Lookup vs eHLR
Two ways to check whether a number is in use. Read the guide →Run the Checks on Your Own List
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