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新技术的采用导致了不同类型通信网络的出现,怎样实现网际通信,特别是各种网络与ISDN互连,引起了人们的关注。 本文简述了各种通信网互连的迫切性和网络互连层次。在介绍ISLN与ISDN互连环境的基础上,着重讨论了互连网关中的寻址及其实现方法,服务原语转换,协议中的时限匹配等问题,修改了网关中的LLC协议,使其适应互连环境,设计了第3层协议,实现了网关中的LLC和第3层软硬件。文中讨论的协议配置优化原则,对网络互连有一定的普遍意义。
The introduction of new technologies has led to the emergence of different types of communications networks, how to achieve Internet communications, in particular, a variety of networks and ISDN interconnection, aroused people’s attention. This article outlines the urgency of various communication network interconnection and network interconnection level. Based on the introduction of interconnection between ISLN and ISDN, this paper focuses on addressing, implementation methods, service primitive translation, and time-limit matching in interconnection gateways. The LLC protocol in gateways is modified to adapt to each other With the environment, the Layer 3 protocol was designed to implement LLC and Layer 3 hardware and software in the gateway. The principle of protocol configuration optimization discussed in this paper has some general significance to network interconnection.