EPC HSS Network Element functions
HLR Network Element functions
IMS Network Element functions
EIR Network Element functions
ZXUN USPP (UDM) supports the UDM function in 5G network. As a unified data management device, it provides services for AMF, SMF, SMSF, AUSF, NEF and GMLC via service-based Nudm interfaces.
ZXUN USPP (AUSF) authenticates UE for the requester NF under 3GPP access and untrusted non-3GPP access and provides security key material. AUSF provides authentication service for AMF via Nausf service-based interface.