X3 . 178a - 1991 information systems - supplement to packet - switched signaling system between public networks providing data transmission services nui utility extensions and format constraints ; supplement x3 . 178a - 1991 信息系统.提供数据传输服务的公用网络间包交换信令系统的补充
Based on tls protocol and proxy mechanism , this system can provide secure data transmission service and authentication service for unsecure applications without modifying t heir codes 该系统基于tls协议和代理机制，可在不修改原有应用代码的情况下，为不具备安全能力的应用提供安全的数据传输服务和身份认证服务。
Recently , as mobile communication technology develops fast and mobile phone diffusion rate ascend year by year , synchronously the data transmission service including internet business expands ceaselessly , computers as internet terminal are not exclusive 近年来,移动通信技术迅猛发展,手机普及率逐年上升的同时,其数据传输业务也不断扩展,包括无线连接internet业务。
