EN 301 656 : 1.2.1现行
PRIVATE INTEGRATED SERVICES NETWORK (PISN); INTER-EXCHANGE SIGNALLING PROTOCOL; CALL PRIORITY INTERRUPTION AND CALL PRIORITY INTERRUPTION PROTECTION SUPPLEMENTARY SERVICES
出版：European Telecommunications Standards Institute
专家解读视频
Specifies the signalling protocol for the support Call priority interruption supplementary service (SS-CPI) at the Q reference point between Private Integrated services Network eXchanges (PINX) connected together within a Private Integrated Services Network (PISN).
NBN EN 301 656 : 2004 - Identical
ECMA 264 : 3ED 2001 - Corresponds
NF EN 301656 : 2004 - Identical
PN EN 301 656 : 2005 - Identical
NEN EN 301656 : 2004 - Identical
DS EN 301656 : 2006 - Identical
DIN EN 301656 : 2004 - Identical
