EN 300 426 : 1.3.1现行
PRIVATE INTEGRATED SERVICES NETWORK (PISN); INTER-EXCHANGE SIGNALLING PROTOCOL; CALL INTRUSION SUPPLEMENTARY SERVICE
出版：European Telecommunications Standards Institute
专家解读视频
This EN will endorse the ISO Stage 3 Call intrusion supplementary service (ISO 14846). It is the version 2 of ETS 300 426.
NF EN 300426 : 2004 - Identical
PN EN 300 426 : 2005 - Identical
NEN EN 300426 : 2004 - Identical
NBN EN 300 426 : 2004 - Identical
DIN EN 300426 : 2004 - Identical
DS EN 300426 : 2006 - Identical
