{{unreferenced, date=May 2018
The subscriber location function, or SLF is a function within an
IP multimedia subsystem
The IP Multimedia Subsystem or IP Multimedia Core Network Subsystem (IMS) is a standardised architectural framework for delivering IP multimedia services. Historically, mobile phones have provided voice call services over a circuit-switched-styl ...
that provides information about the home subscriber server (HSS) that is associated with a particular user profile. It is generally implemented using a
database
In computing, a database is an organized collection of data stored and accessed electronically. Small databases can be stored on a file system, while large databases are hosted on computer clusters or cloud storage. The design of databases sp ...
. If the home domain contains more than one HSS,
I-CSCF
The IP Multimedia Subsystem or IP Multimedia Core Network Subsystem (IMS) is a standardised architectural framework for delivering IP multimedia services. Historically, mobile phones have provided voice call services over a circuit-switched-style ...
and S-CSCF will communicate with SLF and find the appropriate HSS based on user profile. CSCF communicates with the SLF using diameter Dx
interface
Interface or interfacing may refer to:
Academic journals
* ''Interface'' (journal), by the Electrochemical Society
* ''Interface, Journal of Applied Linguistics'', now merged with ''ITL International Journal of Applied Linguistics''
* '' Inte ...
and the application server communicates with the SLF using Sh interface.