ISO/IEC 21990 : 2002(R 2015)现行
INFORMATION TECHNOLOGY - TELECOMMUNICATIONS AND INFORMATION EXCHANGE BETWEEN SYSTEMS - PRIVATE INTEGRATED SERVICES NETWORK - INTER-EXCHANGE SIGNALLING PROTOCOL - SHORT MESSAGE SERVICE
出版：International Organization for Standardization
专家解读视频
Describes the signalling protocol for the support of the Short message Service (SMS) at the Q reference point between Private Integrated Services Network eXchanges (PINXs) connected together within a Private Integrated Services Network (PISN).
DIN EN 301991 : 2004 - Corresponds
NEN ISO/IEC 21990 : 2002 - Identical
CSA ISO/IEC 21990 : 2004 : R2017 - Identical
CSA ISO/IEC 21990 : 2004 - Identical
CSA ISO/IEC 21990 : 2004 : R2012 - Identical
CSA ISO/IEC 21990 : 2004 - Identical
