Control Layer - Part 2 (CSCF)

We already talked about HSS, now is time to describe other component. The CSCF (Call Session Control Function) is a SIP server and it's responsable for the first iterations int the IMS network. It has the function of registration the termination and establishment of sessions. The CSCF server is divided on 3 parts: S-CSCF (Serving), I-CSCF (Interrogating) and P-CSCF (Proxy).

Source: http://www.3gdb.org/

In coming posts we will go into detail on each part of the server CSCF.