据统计,全球的软交换商用网络已经超过250个,而国内的软交换也已经进入试商用阶段,特别是新运营商直接采用软交换构建交换网络的趋势越来越明显,2004年后的通信网络规划与建设已经进入NGN时代。同时,在接入网向其理想目标———光纤到户(FTTH)的发展过程中,接入技术本身也有了 According to statistics, there are more than 250 commercial softswitches in the world, and domestic softswitches have also entered the trial commercial phase. In particular, the trend of using new softswitches directly by new operators to build switching networks becomes more and more obvious. After 2004, Network planning and construction have entered the NGN era. At the same time, access technology itself has been developed during the development of the access network to its ideal destination, FTTH