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RCS MSRP 融合网
08-05
MMTel MSRP GSM OMA 网络通信 SIP TISPAN GSMA IPTV LTE RCS VoLTE IMS XCAP 3GPP VCC reference network
VoLTE VCC OMA MSRP GSMA GSM SIP RCS 3GPP LTE TISPAN MMTel IPTV IMS XCAP 网络