QSIG–At a Glance

QSIG Overview QSIG is originally developed by ECMA International, aiming to facilitate the interoperation among the communication platform from disparate vendors. QSIG has two layers, called BC (basic call) and GF (generic function). QSIG BC describes how to set up calls between PBXs. QSIG GF provides supplementary services such as line identification, call intrusion and …

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