公用陆地移动通信网 meaning in Chinese

plmn public land mobile network

Vpmn service operated in the plmn provides the mobile users in the user groups that have subscribed to the service with private network service similar to pbx service in the pstn
公用陆地移动通信网网内开放vpmn业务可以为申请了此业务的集团内的移动用户提供类似公用固定电话网中小交换机（ pbx ）的专用网络业务。
Vpmn service is a service which allows group users to communicate with each other through abbreviated numbering or dedicated numbering plans over a private network of logic voice circuits , based on the public land mobile network ( plmn ) and the public fixed telephone network ( pstn )
虚拟专用移动网业务（以下简称为vpmn ）是在公用陆地移动通信网（ plmn ）和公用固定电话网（ pstn ）上建立一个逻辑话路专用网，通过缩位拨号、专用编号计划等方式使企业、集团用户群内进行相互联系的网络。