EN 301 820 : 1.2.1现行
PRIVATE INTEGRATED SERVICES NETWORK (PISN); INTER-EXCHANGE SIGNALLING PROTOCOL; COMMON INFORMATION ADDITIONAL NETWORK FEATURE (ANF)
出版：European Telecommunications Standards Institute
专家解读视频
Describes services and signalling protocols applicable to Private Integrated Services Networks (PISN).
NEN EN 301820 : 2004 - Identical
NBN EN 301 820 : 2004 - Identical
NF EN 301820 : 2006 - Identical
PN EN 301 820 : 2005 - Identical
DS EN 301820 : 2006 - Identical
DIN EN 301820 : 2004 - Identical
