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本文叙述一种ＩＳＤＮ和中继通信用的先进卫星通信系统，它能与地面ＩＳＤＮ系统结合。ＤＹＡＮＥＴ动态信道分配和路由选择卫星辅助数字网）的系统设想已扩展为新的通信平台，称ＤＹＡＮＥＴ－Ⅱ，它使卫星通信可用于ＩＳＤＮ和中继电路。新网络控制技术的发展能有效利用卫星信道，并保证卫星信道的单跳连接，而毋需改动现有网络。此外，还开始研制可安装在用户建筑物的小型地球站设备。
This article describes an advanced satellite communications system for ISDN and relay communications that can be combined with a terrestrial ISDN system. DYANET Dynamic Channel Allocation and Routing Satellite Assist Digital Network) has been expanded to include a new communications platform called DYANET-II, which enables satellite communications for both ISDN and trunk circuits. The development of new network control technologies enables the efficient use of satellite channels and guarantees one-hop satellite channel connections without changing existing networks. In addition, it started to develop small earth station equipment that can be installed in user buildings.