
Private Integrated Services Network (pisn); Inter-exchange Signalling Protocol; Circuit-mode Basic Services
出版:Belgian Standards

专家解读视频
2003 [01/09/2003]1999 [01/09/1999]
ISO/IEC 11572:2000 - Identical
EN 300 172 V1.5.1 (2003) - Identical
EN 300 172 : 1.5.1 - Identical
ISO/IEC 11572 : 2000(R2011) - Identical