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虽然电路交换机已经为电信行业服务多年,然而根据美国Millennium-Skyline公司的一项最新研究,目前安装的大约20000台五类交换机的寿命正在走到尽头,为了延长使用期限,需要对交换局进行大量的检修。很显然电路交换将向分组交换演进,虽然美国Sprint和几个独立运营商(IOC)已经开始
Although circuit-switches have been serving the telecom industry for many years, according to a recent study by the Millennium-Skyline Company in the United States, the lifespan of some 20,000 Category-5 switches currently installed is coming to an end. In order to extend the lifespan, Overhaul It is clear that circuit switching will evolve toward packet switching, although the U.S. Sprint and several independent operators (IOCs) have begun