2013 发表于 2013-3-23 23:39:01

ISO/IEC 20114-2004 Information technology — Telecommunications and information

ISO/IEC 20114-2004 Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network (PISN) — Inter-exchange signalling protocol — Make call request supplementary service


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21319817 发表于 2013-8-30 10:40:46

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