SLF - Subscription Locator Function

In an IMS network where multiple separate instances of the HSS can exist, an SLF is used by various network nodes in order to ascertain which HSS holds the subscriber profile of a particular IMS subscriber. Interaction with the SLF is based on Diameter.


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

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