Subscriber location function
Appearance
The Supscriber Locator Function, or SLF is database contains the information about HSS that associated with particular user profile. If home domain contains more than one HSS, I-CSCF and S-CSCF will communicate with SLF and find the appropriate HSS based on user profile. CSCF communicate with SLF using diameter Dx interface and Application server communicate with SLF using Dh interface.