EN 301 260 : 1.2.1现行
PRIVATE INTEGRATED SERVICES NETWORK (PISN); SPECIFICATION, FUNCTIONAL MODELS AND INFORMATION FLOWS; MESSAGE WAITING INDICATION SUPPLEMENTARY SERVICE
出版：European Telecommunications Standards Institute
专家解读视频
Stages 1 and 2 of message waiting indication supplementary service.
DIN EN 301260 : 2004 - Identical
NBN EN 301 260 : 2004 - Identical
PN EN 301 260 : AUG 2005 - Identical
NEN EN 301260 : 2004 - Identical
NF EN 301260 : 2004 - Identical
DS EN 301260 : 2006 - Identical
