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1.公用陆地移动网 公用陆地移动网(PLMN)是由主管部门或RPOA为向公众提供陆地移动电信业务这一特定目的而建立和运营的。PLMN可看作是固定网(例如PSTN)的延伸或PSTN的一个组成部分。在第一种情况下,它可被认为是普通编号表(如业务接续码)和普通路由表(如交叉点的规定)内的多个移动业务交换中心(MSC)区的集合。在这种情况下。MSC是固定网与PLMN之间建立呼叫
1. Public Land Mobile Network The Public Land Mobile Network (PLMN) is established and operated by the Administration or RPOA for the specific purpose of providing land mobile telecommunications services to the public. The PLMN can be seen as an extension of a fixed network (such as the PSTN) or as an integral part of the PSTN. In the first case, it can be thought of as a collection of multiple mobile services switching center (MSC) areas within a common number table (such as a service splice code) and an ordinary routing table (as defined by the intersection point). under these circumstances. The MSC is a call between the fixed network and the PLMN