
Private Integrated Services Network (PISN); Specification, functional model and information flows; Call intrusion supplementary service [ISO/IEC 14845 (1996) modified]
出版:European Telecommunications Standards Institute

专家解读视频
SS EN 300 425 Ed. 1 (1999) - Identical
NF EN 300425:2003 - Identical
NBN EN 300 425:2003 - Identical
PN EN 300 425:2005 - Identical
NEN EN 300425:2003 - Identical
DIN EN 300425 (2004-03) - Identical
ONORM EN 300425:2003 - Identical