HSS is the core node in the LTE data-only network. HSS has the 4G-LTE subscriber profile. The profile has APNs settings along with other details. HSS uses the Diameter Protocol for network interfaces. With MME/SGSN an HSS uses S6a/S6d diameter interface. This is the basic interface for providing data services to an LTE subscriber. 

HSS has S6a/S6d interfaces towards MME/SGSN for Authentication and data services for HSS. With the LTE data speed is good. IOT SIM cards take advantage of high-speed data. HSS one an S6t interface for NB-IOT, which is an LPWN. We provide full support for all HSS interface. We can deliver a simple 4G data only HSS or a complex with many other interfaces.