EN 301 657 : 1.2.1現行
PRIVATE INTEGRATED SERVICES NETWORK (PISN); SPECIFICATION, FUNCTIONAL MODEL AND INFORMATION FLOWS; PRIVATE USER MOBILITY (PUM); CALL HANDLING ADDITIONAL NETWORK FEATURES (ANFS)
出版：European Telecommunications Standards Institute
專家解讀視頻
Defines the services and signalling protocols applicable to Private Integrated Services Networks (PISN). The series uses the Integrated Services Digital Network (ISDN) concepts as developed by ITU-T and conforms to the framework of standards for Open Systems Interconnection (OSI) as defined by ISO/IEC.
NEN EN 301657 : 2003 - Identical
DIN EN 301657 : 2004 - Identical
NF EN 301657 : 2003 - Identical
DS EN 301657 : 2004 - Identical
NBN EN 301 657 : 2003 - Identical
PN EN 301 657 : 2005 - Identical
