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CENTREX也称虚拟用户交换机,是指在市话交换机上将部分用户划分为基本用户群,并为之提供用户交换机的各种功能,同时还提供一些特有的电信网服务功能.CENTREX的引入取代了用户交换机,简化了网络层次,便于统一规划和管理,对网络整体运行水平的提高、增加市场覆盖范围及业务收入具有重要的意义.对于SP30机的CENTREX用户来讲,每个用户群的用户容量只与交换机的容量有关,可以很方便地扩容,最大可达40
CENTREX, also known as Virtual Private Branch Exchange, refers to dividing some users into basic user groups on the local exchange and providing various functions of the user switches, and also providing some unique telecom network service functions. The introduction of Centrex instead of users Switches, simplifying the network level, facilitate the unified planning and management of the overall operation of the network to improve and increase market coverage and business income of great significance.For the SP30 machine CENTERX users, the user capacity of each user group only With the capacity of the switch, you can easily expand, up to 40