ETS 300 172 : 20003现行
PRIVATE TELECOMMUNICATION NETWORK (PTN) - INTER-EXCHANGE SIGNALLING PROTOCOL - CIRCUIT MODE BASIC SERVICES
出版：European Telecommunications Standards Institute
专家解读视频
Defines the Layer 3 protocol for signalling for the support of circuit mode bearer services at the Q reference point between Private Telecommunication Network Exchanges (PTNX) connected together within a Private Telecommunication Network (PTN).
I.S. ETS 300 172:1994 - Identical
ECMA 143 : 4ED 2001 - Corresponds
NBN ETS 300 172 : 1999 - Identical
PN ETS 300 172 : 2005 - Identical
I.S. ETS 300 172:1994 - Identical
ISO/IEC 11572 : 2000(R2011) - Identical
NBN ETS 300 172 : 1999 - Identical
ECMA 143 : 4ED 2001 - Corresponds
PN ETS 300 172 : 2005 - Identical
