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分组交换网(X.25) 采取“存储——转发”的交换方式,提供给用户交换型虚电路(SVC)、永久型虚电路(PVC)的业务,具有差错校验和重发功能和自动选操迥路由的功能,实现不同类型的终端接入。
The packet switching network (X.25) adopts a storage-forwarding switching mode to provide services to user switched virtual circuits (SVCs) and permanent virtual circuits (PVCs), with error checking and retransmission functions and automatic Election routing functions, to achieve different types of terminal access.