
Implementation Of Iso/iec 15050 Private Integrated Services Network (pisn) - Inter-exchange Signalling Protocol - Advice Of Charge Supplementary Services (qsig-aoc)
出版:British Standards Institution

专家解读视频
Implementation Of Iso/iec 15050 Private Integrated Services Network (pisn) - Inter-exchange Signalling Protocol - Advice Of Charge Supplementary Services (qsig-aoc)
出版:British Standards Institution
专家解读视频