像ISDN和dsl, HSSI运营网络的物理层，使用标准的开放系统互连(osi)模型。
Like ISDN and DSL, HSSI operates at the physical layer of a network, using the standard Open Systems Interconnection (OSI) model.
在开放系统互连osi模型中，路由是网络层(第三层)的功能。
Routing is a function associated with the network layer (layer 3) in the standard model of network programming, the Open Systems Interconnection (OSI) model.
信息技术。开放系统互连。OSI登记机构的操作规程：在特定上下文中使用的国际名称的分配。
Information technology - Open Systems Interconnection - Procedures for the operation of OSI registration authorities: Assignment of international names for use in specific contexts.
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