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DDN网络为专线业务的发展做出了较大的贡献,但是,其网络的持续发展却遇到了诸多困难。文中分别论述了DDN网络和SDH网络的发展,充分考虑到SDH(MSTP)光网络的发展现状,综合DDN网络以及DDN业务自身的特点和实际情况,提出一种基于SDH(MSTP)光网络的DDN业务实现方案。该方案实现了高性价比的DDN网络的升级和扩容,解决了DDN网络的发展中遇到的诸多困难,在一定程度上又丰富了MSTP的内容。
DDN network has made great contribution to the development of green line business. However, the continuous development of its network has encountered many difficulties. In this paper, the development of DDN network and SDH network are discussed separately. Considering the development status of SDH (MSTP) optical network and considering the characteristics and actualities of DDN network and DDN service, a new DDN based on SDH (MSTP) Business plan. The solution realizes the upgrade and expansion of cost-effective DDN network, solves many difficulties encountered in the development of DDN network, and to a certain extent, enriches the content of MSTP.