Android的Radio Interface Layer (RIL)提供了电话服务和的radio硬件之间的抽象层。Radio Interface Layer RIL(Radio Interface Layer)负责数据的可靠传输、AT命令的发送以及response的解析。应用处理器通过AT命令集与带GPRS功能的无线通讯模块通信。AT command由Hayes公司发明，是一个调制解调器制造商采用的一个调制解调器命令语言，每条命令以字母"AT"开头。-Android' s Radio I

This document describes the CDMA AT command, its syntax, its responses, and result codes. It serves as the reference for wireless application development based on the CDMA modem and for its integration and testing. The intended audience is expected t