标题: ISO/IEC 15049:1997(E) Information technology -- Telecommunications [打印本页] 作者: cc523pate 时间: 2018-10-14 18:53:34 标题: ISO/IEC 15049:1997(E) Information technology -- Telecommunications
ISO/IEC 15049:1997(E) Information technology -- Telecommunications and information Exchange between systems -- Private
Integrated Services Network -- Specification, functional model and information flows -- Advice of charge supplementary services