Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Circuit-mode multi-rate bearer services — Service description, functional capabilities and information flows
信息技术——系统间的电信和信息交换——专用综合业务网——电路模式多速率承载业务——服务描述、功能能力和信息流
Deals with the service specification functional model and information flows applicable to Private Integrated Services Network (PISN). Uses the ISDN concepts as developed by ITU T (formerly CCITT) and is also within the framework of standards for Open Systems Interconnection (OSI) as defined by ISO.