多项选择题
S-CSCF根据用户的签约信息(从SiFC映射出的iFC)向哪些IMS AS发起第三方注册?()
A.VoLTE SCC AS
B.VoLTE AS
C.IP-SM-GW
D.统一Centrex AS
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多项选择题
A.VoLTE SCC AS
B.VoLTE AS
C.IP-SM-GW
D.统一Centrex AS
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