The tandem switch must first be connected to the transmission equipment providing 2 mbs ports and to the transmission equipment in other tandem area via high - speed ( e . g . 10 gbs ) transmission equipment , and then to digital access and cross - connect system ( dacs ) . it is further connected to the corresponding sdh sub - ring after the vc - 12 level cross - connection carried out by the dacs and finally reaches the end exchange 汇接交换机首先需要连接到提供2mbs端口的传输设备，而后经高速率的传输设备（如10gbs ）到达其它汇接区的传输设备上，再接入到交叉连接设备（ dacs ）上，经dacs进行vc - 12级别的交叉连接，接到各个相应的sdh子环中，最终到达端局交换机。
In this paper , the fuzzy uniform ring , fuzzy uniform subring , fuzzy uniform residue class ring , and direct product of fuzzy uniform rings are defined ; the three necessary and sufficient conditions to describe fuzzy uniform ring by the fuzzy topological ring of type ( qu ) , by fuzzy uniform space and by a family of fuzzy subsets of a ring are obtained 摘要本文定义了模糊一致环概念，研究了它与模糊拓扑环的关系及它与模糊一致空间的关系；给出了借助于环的模糊子集族对模糊一致环的刻画，还引入了模糊一致子环，模糊一致剩余类环与模糊一致环的直积；并讨论了它们的分离性。
