Another issue is that the current network was built for circuit - switched services 另一个问题是,目前的网络是为电路交换服务而建立起来的。
17 what is a major advantage of circuit - switched networks over packet - switched networks 题目的意思是说从线路交换转变为包交换网络的好处是什么?
The investment in the telecommunications grade softswitch system is lower than that in the existing circuit - switched system 期望电信级的软交换体系设备投资优于现在的电路交换系统。
Delays ( latency ) and variability of delay ( jitter ) are greater in packet - switched than in circuit - switched networks 更棒的是分封交换的延迟(等待时间)和延迟的变化(剧跳)是超越电路交换网路的。