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
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美
- 信息技術(shù)。系統間電信和信息交換。專(zhuān)業(yè)集成服務(wù)網(wǎng)。電路式多速率承載服務(wù)。服務(wù)說(shuō)明、功能特性和信息流
