我们经常讲国家安全网,其实主要就指的是应急通讯网,其实国家安全网还包括信息安全网等,范畴要大一些。应急通讯网顾名思义就是在急的时候能用的上。比如发生地震等自然灾害后,运营商的网络都损坏用不了了,这时候应急通讯网要能用的上。这就要求应急通讯
DMO is the term used by the TETRA industry to describe the ability of TETRA radio terminals to communicate directly with each other (like Walkie-Talkies) independent of the Trunked Mode Operation (TMO) network. DMO is not new and has been