随着LTE网络的快速部署，运营商对于网络价值的深度挖掘不断加强，不仅最大化地利用现有的2G、3G和4G网络，同时对于Wi-Fi网络的商业价值也在积极探索跟进。 此前一直作为移动网络业务补充的Wi-Fi网络，在LTE时代被进一步地深挖其价值，目前来看，国内三大运营
To meet the needs of traditional PMR user organisations, a wide range of V+D services and facilities have been provided in the standard, of which the most important are considered to be: Voice Services Group Call (commonly called all infor
