Integrated Services Digital Network (ISDN); Signalling Systim No. 7; Signalling connection Control Part (SCCP) [connectionless and connection-oriented] to support international interconnection.
综合业务数字网(ISDN)；7号信令；支持国际互连信令连接控制部分(SCCP)[无连接和定向连接]。
The SPX layer sits on top of the IPX layer (layer 3) and provides connection-oriented services between two nodes on the network.
SPX层位于IPX层(第三层)之上，可以为网络的两个节点提供基于连接的服务。
The SPX layer sits on top of the IPX layer (layer 3) and provides connection-oriented services between two nodes on the network.
SPX层位于IPX层(第三层)之上，可以为网络的两个节点提供基于连接的服务。
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