标准摘要
[中文适用范围]： SS-CO（Call Offer 补充业务），适用于PISN（Private Integrated Services Network）支持的各种基础业务。 ISO/IEC 11574 中规定了基本服务。 [外文原描述]： Specifies the Call Offer supplementary service (SS-CO), which is applicable to various basic services supported by Private Integrated Services Networks (PISN). Basic services are specified in ISO/IEC 11574.
英文名称Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Specification, functional model and information flows - Call offer supplementary service