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MMTel MSRP GSM OMA 網絡通信 SIP TISPAN GSMA IPTV LTE RCS VoLTE IMS XCAP 3GPP VCC reference network
08-05
VoLTE VCC OMA MSRP GSMA GSM SIP RCS 3GPP LTE TISPAN MMTel IPTV IMS XCAP 網絡
硬體 VCC VDD vss 電路
05-02
