| ? 基本功能 ? 呼入 ? 呼出 ? 编辑、发送、接收和阅读短信 ? 系统组成 ? 手机的基本硬件 ? 键盘（10个号码键、呼叫、挂断、上下左右四个方向键、退格键），显示屏， 麦克风和扬声器 ? 手机的基本操作系统 ? 包含基本硬件系统的控制软件 ? 包含手机和基站系统间的通信接口 ? 手机的应用软件 ? 呼叫处理和短信功能 -basic functions # 61550 # # 61557 61557 inbound exhaled # 61557 edit, send, receive and read messages # 61550 # 61557 system composed of the basic phone hardware keyboard # 61556 (No. 10 keys, call, hang up, from top to bottom about four direction keys and backspace) , screen, microphone and speaker phone # 61557 # 61556 basic operating system contains basic hardware system control software # 61556 includes base stations and mobile communications systems interface to the phone # 61557 # 61556 application software call processing and messaging functions 下载 |