Call Session Control Function (´Ù¾çÇÑ ¸ÖƼ¹Ìµð¾î ¼­ºñ½º¸¦ Á¦°ø °¡´ÉÇÏ°Ô ÇÔ)
-3G ³×Æ®¿öÅ© »ó¿¡¼­ SIP ±â¹ÝÀÇ Call Control ¹× Session Handling±â´ÉÀ» ¼öÇàÇÏ´Â ½Ã½ºÅÛ
[Á¾·ù]Proxy-CSCF(P-CSCF), Interrogating-CSCF(I-CSCF) ¹× Serving-CSCF(S-CSCF)