A.CSCF B.AGCF C.SSS D.HSS
A.INVITE B.200OK(INVITE) C.181 D.180
A.話單構(gòu)造 B.話單分揀 C.話單過(guò)濾 D.話單字段處理
A.SIP,SIP,SIP B.SIP,DIAMETER,DIAMETER C.DIAMETER,SIP,H248 D.SIP,DIAMETER,H248