ETS 300 426 Ed.1 (1995)现行
Private Integrated Services Network (PISN); Inter-exchange signalling protocol; Call intrusion supplementary service [ISO/IEC 14846 (1996), modified]
出版：European Telecommunications Standards Institute
专家解读视频
Intrusion supplementary service (SS-CI) at the Q reference point between Private Telecommunication Network Exchanges (PTNXs) connected together within a Private Telecommunication Network(PTN)
SS ETS 300 426:1995 - Identical
DIN ETS 300426 (1996-04) - Identical
NBN ETS 300 426:1996 - Identical
PN ETS 300 426:2005 - Identical
